–noun

1.	a mixture of nitrogen, oxygen, and minute amounts of other gases that surrounds the earth and forms its atmosphere.

2.	a stir in the atmosphere; a light breeze.

3.	overhead space; sky: The planes filled the air.

4.	circulation; publication; publicity: to give air to one's theories.

5.	the general character or complexion of anything; appearance: His early work had an air of freshness and originality.

6.	the peculiar look, appearance, and bearing of a person: There is an air of mystery about him.

7.	airs, affected or unnatural manner; manifestation of pride or vanity; assumed haughtiness: He acquired airs that were insufferable to his friends.

8.	Music. a. a tune; melody. b. the soprano or treble part. c. an aria. d. Also, ayre. an Elizabethan art song.

9.	aircraft as a means of transportation: to arrive by air; to ship goods by air.

10.	Informal. air conditioning or an air-conditioning system: The price includes tires, radio, and air.

11.	Radio. the medium through which radio waves are transmitted.

12.	Archaic. breath.

–verb (used with object)

13.	to expose to the air; give access to the open air; ventilate (often fol. by out): We air the bedrooms every day.

14.	to expose ostentatiously; bring to public notice; display: to air one's opinions; to air one's theories.

15.	to broadcast or televise.

–verb (used without object)

16.	to be exposed to the open air (often fol. by out): Open the window and let the room air out.

17.	to be broadcast or televised.

–adjective

18.	operating by means of air pressure or by acting upon air: an air drill; an air pump.

19.	of or pertaining to aircraft or to aviation: air industry.

20.	taking place in the air; aerial: air war.

—Idioms

21.	clear the air, to eliminate dissension, ambiguity, or tension from a discussion, situation, etc.: The staff meeting was intended to help clear the air.

22.	get the air, Informal. a. to be rejected, as by a lover. b. to be dismissed, as by an employer: He had worked only a few days when he got the air.

23.	give (someone) the air, Informal. a. to reject, as a lover: H 3e8 e was bitter because she gave him the air. b. to dismiss, as an employee.

24.	in the air, in circulation; current: There's a rumor in the air that we're moving to a new location.

25.	into thin air, completely out of sight or reach: He vanished into thin air.

26.	off the air, a. not broadcasting: The stat ee2 ion goes off the air at midnight. b. not broadcast; out of operation as a broadcast: The program went off the air years ago. c. (of a computer) not in operation.

27.	on the air, a. in the act of broadcasting; being broadcast: The program will be going on the air in a few seconds. b. (of a computer) in operation.

28.	put on airs, to assume an affected or haughty manner: As their fortune increased, they began to put on airs.

29.	take the air, a. to go out-of-doors; take a short walk or ride. b. Slang. to leave, esp. hurriedly. c. to begin broadcasting.

30.	up in the air, a. Also, in the air. undecided or unsettled: The contract is still up in the air. b. Informal. angry; perturbed: There is no need to get up in the air over a simple mistake.

31.	walk or tread on air, to feel very happy; be elated.

–noun

1.	a piece of furniture upon which or within which a person sleeps, rests, or stays when not well.

2.	the mattress and bedclothes together with the bedstead of a bed.

3.	the bedstead alone.

4.	the act of or time for sleeping: Now for a cup of cocoa and then bed.

5.	the use of a bed for the night; lodging: I reserved a bed at the old inn.

6.	the marital relationship.

7.	any resting place: making his bed under a tree.

8.	something resembling a bed in form or position.

9.	a piece or area of ground in a garden or lawn in which plants are grown.

10.	an area in a greenhouse in which plants are grown.

11.	the plants in such areas.

12.	the bottom of a lake, river, sea, or other body of water.

13.	a piece or part forming a foundation or base.

14.	a layer of rock; a stratum.

15.	a foundation surface of earth or rock supporting a track, pavement, or the like: a gravel bed for the roadway.

16.	Building Trades. a. the underside of a stone, brick, slate, tile, etc., laid in position. b. the upper side of a stone laid in position. c. the layer of mortar in which a brick, stone, etc., is laid. d. the natural stratification of a stone: a stone laid on bed.

17.	Furniture. skirt (def. 6b).

18.	the flat surface in a printing press on which the form of type is laid.

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19.	Transportation. the body or, sometimes, the floor or bottom of a truck or trailer.

20.	Chemistry. a compact mass of a substance functioning in a reaction as a catalyst or reactant.

21.	Sports. a. the canvas surface of a trampoline. b. the smooth, wooden floor of a bowling alley. c. the slate surface of a billiard table to which the cloth is fastened.

22.	Zoology. flesh enveloping the base of a claw, esp. the germinative layer beneath the claw.

23.	Also called mock, mock mold. Shipbuilding. a shaped steel pattern upon which furnaced plates for the hull of a vessel are hammered to shape.

24.	bed and board.

–verb (used with object)

25.	to provide with a bed.

26.	to put to bed.

27.	Horticulture. to plant in or as in a bed.

28.	to lay flat.

29.	to place in a bed or layer: to bed oysters.

30.	to embed, as in a substance: bedding the flagstones in concrete.

31.	to take or accompany to bed for purposes of sexual intercourse.

–verb (used without object)

32.	to have sleeping accommodations: He says we can bed there for the night.

33.	Geology. to form a compact layer or stratum.

34.	(of a metal structural part) to lie flat or close against another part.

35.	Archaic. to go to bed.

—Verb phrase

36.	bed down, a. to make a bed for (a person, animal, etc.). b. to retire to bed: They put out the fire and decided to bed down for the night.

—Idioms

37.	get up on the wrong side of the bed, to be irritable or bad-tempered from the start of a day: Never try to reason with him when he's gotten up on the wrong side of the bed.

38.	go to bed, a. to ae9 retire, esp. for the night. b. to engage in sexual relations.

39.	go to bed with, to have sexual intercourse with.

40.	in bed, a. beneath the covers of a bed. b. engaged in sexual intercourse.

41.	jump or get into bed with, to form a close, often temporary, alliance, usually with an unlikely ally: Industry was charged with jumping into bed with labor on the issue.

42.	make a bed, to fit a bed with sheets and blankets.

43.	make one's bed, to be responsible for one's own actions and their results: You've made your bed—now lie in it.

44.	put to bed, a. to help (a child, invalid, etc.) go to bed. b. Printing. to lock up (forms) in a press in preparation for printing. c. to work on the preparation of (an edition of a newspaper, periodical, etc.) up to the time of going to press.