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radiator
radiator: n.
1 a person or thing that radiates.
2 a a device for heating a room etc., consisting of a metal case through which hot water or steam circulates. b a usu. portable oil or electric heater resembling this.
3 an engine-cooling device in a motor vehicle or aircraft with a large surface for cooling circulating water. radiator grille a grille at the front of a motor vehicle allowing air to circulate to the radiator.

reptile
reptile: n. & adj. --n.
1 any cold-blooded scaly animal of the class Reptilia, including snakes, lizards, crocodiles, turtles, tortoises, etc.
2 a mean, grovelling, or repulsive person. --adj.
1 (of an animal) creeping.
2 mean, grovelling. reptilian adj. & n. [ME f. LL reptilis f. L repere rept- crawl]

receiver
receiver: n.
1 a person or thing that receives.
2 the part of a machine or instrument that receives sound, signals, etc. (esp. the part of a telephone that contains the earpiece).
3 (in full official receiver) a person appointed by a court to administer the property of a bankrupt or insane person, or property under litigation.
4 a radio or television receiving apparatus.
5 a person who receives stolen goods.
6 Chem. a vessel for collecting the products of distillation, chromatography, etc.

rickey
rickey: n. (pl. -eys) a drink of spirit (esp. gin), lime-juice, etc. [20th c.: prob. f. the surname Rickey]

racemic
racemic: adj. Chem. composed of equal numbers of dextrorotatory and laevorotatory molecules of a compound. racemize v.tr. & intr. (also -ise). [RACEME + -IC, orig. of tartaric acid in grape-juice]

rainbow
rainbow: n. & adj. --n.
1 an arch of colours (conventionally red, orange, yellow, green, blue, indigo, violet) formed in the sky (or across a cataract etc.) opposite the sun by reflection, twofold refraction, and dispersion of the sun's rays in falling rain or in spray or mist.
2 a similar effect formed by the moon's rays. --adj. many-coloured. rainbow lorikeet a small brightly coloured Polynesian parrot, Trichoglossus haematodus. rainbow trout a large trout, Salmo gairdneri, orig. of the Pacific coast of N. America. secondary rainbow an additional arch with the colours in reverse order formed inside or outside a rainbow by twofold reflection and twofold refraction. [OE regnboga (as RAIN, BOW(1))]

resigned
resigned: adj. (often foll. by to) having resigned oneself; submissive, acquiescent. resignedly adv. resignedness n.

representation
representation: n.
1 the act or an instance of representing or being represented.
2 a thing (esp. a painting etc.) that represents another.
3 (esp. in pl.) a statement made by way of allegation or to convey opinion. [ME f. OF representation or L repraesentatio (as REPRESENT)]

reliance
reliance: n.
1 (foll. by in, on) trust, confidence (put full reliance in you).
2 a thing relied upon. reliant adj.

research
research: disp. n. & v. --n.
1 a the systematic investigation into and study of materials, sources, etc., in order to establish facts and reach new conclusions. b (usu. in pl.) an endeavour to discover new or collate old facts etc. by the scientific study of a subject or by a course of critical investigation.
2 (attrib.) engaged in or intended for research (research assistant). --v.
1 tr. do research into or for.
2 intr. make researches. research and development (in industry etc.) work directed towards the innovation, introduction, and improvement of products and processes. researchable adj. researcher n. [obs. F recerche (as RE-, SEARCH)]

religion
religion: n.
1 the belief in a superhuman controlling power, esp. in a personal God or gods entitled to obedience and worship.
2 the expression of this in worship.
3 a particular system of faith and worship.
4 life under monastic vows (the way of religion).
5 a thing that one is devoted to (football is their religion). freedom of religion the right to follow whatever religion one chooses. religionless adj. [ME f. AF religiun, OF religion f. L religio -onis obligation, bond, reverence]

reply
reply: v. & n. --v. (-ies, -ied.
1 intr. (often foll. by to) make an answer, respond in word or action.
2 tr. say in answer (he replied, 'Please yourself'). --n. (pl. -ies.
1 the act of replying (what did they say in reply?).
2 what is replied; a response.
3 Law = REPLICATION. reply coupon a coupon exchangeable for stamps in any country for prepaying the reply to a letter. reply pai.
1 hist. (of a telegram) with the cost of a reply prepaid by the sender.
2 (of an envelope etc.) for which the addressee undertakes to pay postage. replier n. [ME f. OF replier f. L (as REPLICATE)]

recipe
recipe: n.
1 a statement of the ingredients and procedure required for preparing cooked food.
2 an expedient; a device for achieving something.
3 a medical prescription. [2nd sing. imper. (as used in prescriptions) of L recipere take, RECEIVE]

reflux
reflux: n. & v. --n.
1 a backward flow.
2 Chem. a method of boiling a liquid so that any vapour is liquefied and returned to the boiler. --v.tr. & intr. Chem. boil or be boiled under reflux.

rampagerriddling
riddling: adj. expressed in riddles; puzzling. riddlingly adv.

route
route: Mil. also n. & v. --n.
1 a way or course taken (esp. regularly) in getting from a starting-point to a destination.
2 US a round travelled in delivering, selling, or collecting goods.
3 Mil. archaic marching orders. --v.tr. (routeing) send or forward or direct to be sent by a particular route. route man US = ROUNDSMAN 1. route march a training-march for troops. [ME f. OF r(o)ute road ult. f. L ruptus broken]

realtor
realtor: n. US a real-estate agent, esp. (Realtor) a member of the National Association of Realtors.

religious
religious: adj. & n. --adj.
1 devoted to religion; pious, devout.
2 of or concerned with religion.
3 of or belonging to a monastic order.
4 scrupulous, conscientious (a religious attention to detail). --n. (pl. same) a person bound by monastic vows. religiously adv. religiousness n. [ME f. AF religius, OF religious f. L religiosus (as RELIGION)]

rheumatism
rheumatism: n. any disease marked by inflammation and pain in the joints, muscles, or fibrous tissue, esp. rheumatoid arthritis. [F rhumatisme or L rheumatismus f. Gk rheumatismos f. rheumatizo f. rheuma stream]

rental
rental: n.
1 the amount paid or received as rent.
2 the act of renting.
3 an income from rents.
4 US a rented house etc. rental library US a library which rents books for a fee. [ME f. AF rental or AL rentale (as RENT(1))]

restaurant
restaurant: n. public premises where meals or refreshments may be had. restaurant car Brit. a dining-car on a train. [F f. restaurer RESTORE]

reward
reward: n. & v.
1 a a return or recompense for service or merit. b requital for good or evil; retribution.
2 a sum offered for the detection of a criminal, the restoration of lost property, etc. --v.tr. give a reward to (a person) or for (a service etc.). rewardless adj. [ME f. AF, ONF reward = OF reguard REGARD]

reap
reap: v.tr.
1 cut or gather (a crop, esp. grain) as a harvest.
2 harvest the crop of (a field etc.).
3 receive as the consequence of one's own or others' actions. [OE ripan, reopan, of unkn. orig.]

relative
relative: adj. & n. --adj.
1 considered or having significance in relation to something else (relative velocity).
2 (foll. by to) having existence only as perceived or considered by (beauty is relative to the eye of the beholder).
3 (foll. by to) proportioned to (something else) (growth is relative to input).
4 implying comparison or contextual relation ('heat' is a relative word).
5 comparative; compared one with another (their relative advantages).
6 having mutual relations; corresponding in some way; related to each other.
7 (foll. by to) having reference or relating (the facts relative to the issue).
8 involving a different but corresponding idea (the concepts of husband and wife are relative to each other).
9 Gram. a (of a word, esp. a pronoun) referring to an expressed or implied antecedent and attaching a subordinate clause to it, e.g. which, who. b (of a clause) attached to an antecedent by a relative word. 10 Mus. (of major and minor keys) having the same key signature. 11 (of a service rank) corresponding in grade to another in a different service. 12 pertinent, relevant; related to the subject (need more relative proof). --n.
1 a person connected by blood or marriage.
2 a species related to another by common origin (the apes, man's closest relatives).
3 Gram. a relative word, esp. a pronoun.
4 Philos. a relative thing or term. relative atomic mass the ratio of the average mass of one atom of an element to one twelfth of the mass of an atom of carbon-12: also called atomic weight. relative density Chem. the ratio of the density of a substance to the density of a standard, usu. water for a liquid or solid, and air for a gas. relative molecular mass the ratio of the average mass of one molecule of an element or compound to one twelfth of the mass of an atom of carbon-12: also called molecular weight. relatival adj. (in sens.
3 of n.). relatively adv. relativeness n. [ME f. OF relatif -ive or LL relativus having reference or relation (as RELATE)]

rickshaw
rickshaw: n. (also ricksha) a light two-wheeled hooded vehicle drawn by one or more persons. [abbr. of jinricksha, jinrikshaw f. Jap. jinrikisha f. jin person + riki power + sha vehicle]

resume
resume: v. & n. --v.
1 tr. & intr. begin again or continue after an interruption.
2 tr. & intr. begin to speak, work, or use again; recommence.
3 tr. get back; take back; recover; reoccupy (resume one's seat). --n. = RSUM. resumable adj. [ME f. OF resumer or L resumere resumpt- (as RE-, sumere take)]

robotics
robotics: n.pl. the study of robots; the art or science of their design and operation.

reorder
reorder: v. & n. --v.tr. order again. --n. a renewed or repeated order for goods.

revenue
revenue: n.
1 a income, esp. of a large amount, from any source. b (in pl.) items constituting this.
2 a State's annual income from which public expenses are met.
3 the department of the civil service collecting this. revenue tax a tax imposed to raise revenue, rather than to affect trade. [ME f. OF revenu(e) past part. of revenir f. L revenire return (as RE-, venire come)]

rice
rice: n. & v. n.
1 a swamp grass, Oryza sativa, cultivated in marshes, esp. in Asia.
2 the grains of this, used as cereal food. --v.tr. US sieve (cooked potatoes etc.) into thin strings. rice-bowl an area producing much rice. rice-paper edible paper made from the pith of an oriental tree and used for painting and in cookery. ricer n. [ME rys f. OF ris f. It. riso, ult. f. Gk oruza, of oriental orig.]

running
running: n. & adj. --n.
1 the action of runners in a race etc.
2 the way a race etc. proceeds. --adj.
1 continuing on an essentially continuous basis though changing in detail (a running battle).
2 consecutive; one after another (three days running).
3 done with a run (a running jump). in (or out of) the running (of a competitor) with a good (or poor) chance of winning. make (or take up) the running take the lead; set the pace. running account a current account. running-board a footboard on either side of a vehicle. running commentary an oral description of events as they occur. running fire successive shots from a line of troops etc. running gear the moving or running parts of a machine, esp. the wheels and suspension of a vehicle. running hand writing in which the pen etc. is not lifted after each letter. running head (or headline) a heading printed at the top of a number of consecutive pages of a book etc. running knot a knot that slips along the rope etc. and changes the size of a noose. running ligh.
1 = navigation light.
2 each of a small set of lights on a motor vehicle that remain illuminated while the vehicle is running. running mate U.
1 a candidate for a secondary position in an election.
2 a horse entered in a race in order to set the pace for another horse from the same stable which is intended to win. running repairs minor or temporary repairs etc. to machinery while in use. running rope a rope that is freely movable through a pulley etc. running sore a suppurating sore. running stitc.
1 a line of small non-overlapping stitches for gathering etc.
2 one of these stitches. running water water flowing in a stream or from a tap etc. take a running jump (esp. as int.) sl. go away.

rubbish
rubbish: n. & v. --n. esp. Brit.
1 waste material; debris, refuse, litter.
2 worthless material or articles; trash.
3 (often as int.) absurd ideas or suggestions; nonsense. --v.tr. colloq.
1 criticize severely.
2 reject as worthless. rubbishy adj. [ME f. AF rubbous etc., perh. f. RUBBLE]

resignation
resignation: n.
1 the act or an instance of resigning, esp. from one's job or office.
2 the document etc. conveying this intention.
3 the state of being resigned; the uncomplaining endurance of a sorrow or difficulty. [ME f. OF f. med.L resignatio (as RESIGN)]

romanticism
romanticism: n. (also Romanticism) adherence to a romantic style in art, music, etc.

ragee
ragee: n. (also raggee) a coarse cereal, Eleusine coracana, forming a staple food in parts of India etc. [Hindi ragi]

remand
remand: v. & n. --v.tr. return (a prisoner) to custody, esp. to allow further inquiries to be made. --n. a recommittal to custody. on remand in custody pending trial. remand centre (in the UK) an institution to which accused persons are remanded pending trial. [ME f. LL remandare (as RE-, mandare commit)]

refrigerator
refrigerator: n. a cabinet or room in which food etc. is kept cold.

reagent
reagent: n. Chem.
1 a substance used to cause a reaction, esp. to detect another substance.
2 a reactive substance or force. [RE- + AGENT: cf. REACT]

raccoon
raccoon: var. of RACOON.

ranch
ranch: n. & v. --n.
1 a a cattle-breeding establishment esp. in the US and Canada. b a farm where other animals are bred (mink ranch).
2 US a single-storey or split-level house. --v.intr. farm on a ranch. [Sp. rancho group of persons eating together]

reaction
reaction: n.
1 the act or an instance of reacting; a responsive or reciprocal action.
2 a a responsive feeling (what was your reaction to the news?). b an immediate or first impression.
3 the occurrence of a (physical or emotional) condition after a period of its opposite.
4 a bodily response to an external stimulus, e.g. a drug.
5 a tendency to oppose change or to advocate return to a former system, esp. in politics.
6 the interaction of substances undergoing chemical change.
7 propulsion by emitting a jet of particles etc. in the direction opposite to that of the intended motion. reactionist n. & adj. [REACT + -ION or med.L reactio (as RE-, ACTION)]

reason
reason: n. & v. --n.
1 a motive, cause, or justification (has good reasons for doing this; there is no reason to be angry).
2 a fact adduced or serving as this (I can give you my reasons).
3 the intellectual faculty by which conclusions are drawn from premisses.
4 sanity (has lost his reason).
5 Logic a premiss of a syllogism, esp. a minor premiss when given after the conclusion.
6 a faculty transcending the understanding and providing a priori principles; intuition.
7 sense; sensible conduct; what is right or practical or practicable; moderation. --v.
1 intr. form or try to reach conclusions by connected thought.
2 intr. (foll. by with) use an argument (with a person) by way of persuasion.
3 tr. (foll. by that + clause) conclude or assert in argument.
4 tr. (foll. by why, whether, what + clause) discuss; ask oneself.
5 tr. (foll. by into, out of) persuade or move by argument (I reasoned them out of their fears).
6 tr. (foll. by out) think or work out (consequences etc.).
7 tr. (often as reasoned adj.) express in logical or argumentative form.
8 tr. embody reason in (an amendment etc.). by reason of owing to. in (or within) reason within the bounds of sense or moderation. it stands to reason (often foll. by that + clause) it is evident or logical. listen to reason be persuaded to act sensibly. see reason acknowledge the force of an argument. with reason justifiably. reasoner n. reasoning n. reasonless adj. [ME f. OF reisun, res(o)un, raisoner, ult. f. L ratio -onis f. reri rat- consider]

raggee
raggee: var. of RAGEE.

rein
rein: n. & v. --n. (in sing. or pl..
1 a long narrow strap with each end attached to the bit, used to guide or check a horse etc. in riding or driving.
2 a similar device used to restrain a young child.
3 a means of control. --v.tr.
1 check or manage with reins.
2 (foll. by up, back) pull up or back with reins.
3 (foll. by in) hold in as with reins; restrain.
4 govern, restrain, control. draw rei.
1 stop one's horse.
2 pull up.
3 abandon an effort. give free rein to remove constraints from; allow full scope to. keep a tight rein on allow little freedom to. reinless adj. [ME f. OF rene, reigne, earlier resne, ult. f. L retinere RETAIN]

reviserretirerrealistic
realistic: adj.
1 regarding things as they are; following a policy of realism.
2 based on facts rather than ideals. realistically adv.

ravin
ravin: n. poet. or rhet.
1 robbery, plundering.
2 the seizing and devouring of prey.
3 prey. beast of ravin a beast of prey. [ME f. OF ravine f. L rapina RAPINE]

retriever
retriever: n.
1 a a dog of a breed used for retrieving game. b this breed.
2 a person who retrieves something.

remind
remind: v.tr.
1 (foll. by of) cause (a person) to remember or think of.
2 (foll. by to + infin. or that + clause) cause (a person) to remember (a commitment etc.) (remind them to pay their subscriptions).