WordReference Random House Learner's Dictionary of American English © 2017
air1 /ɛr/USA pronunciation   n. 
  1. Physics[uncountable;  often: the + ~] the mixture of nitrogen, oxygen, and other gases that surrounds the earth and forms its atmosphere.
  2. a light breeze:[uncountable]The air stirred.
  3. overhead space;
    sky:[uncountable;  often: the + ~]The kite rose high in the air.
  4. general character or appearance;
    aura:[countable;  singular]had an air of mystery about him.
  5. airs, [plural] an affected or haughty manner:Stop putting on airs.
  6. Music and Dance[countable] a tune;
    melody: humming a simple air.
  7. [uncountable] aircraft as a means of transportation: to ship by air.
  8. Informal Terms Informal. an air-conditioning system:[uncountable]a car equipped with air and a cassette player.

  1. to expose to the air;
    ventilate: [~ (+ out) + object]to air (out) a room.[+ object (+ out)]Let's air the room (out).[no object;  (~ + out)]Let the room air (out).
  2. to bring to public notice;
    display:[+ object]to air one's opinions.
  3. Show Business, Radio and Televisionto broadcast or televise;
    to be broadcast or televised: [~ + object]aired the program during prime time.[no object]The program airs in prime time.

  1. operating by air pressure or by acting upon air:an air pump.
  2. of or relating to aircraft or to aviation:air traffic control.
  1. Idiomsclear the air, to get rid of or eliminate misunderstandings:decided to discuss their differences and clear the air.
  2. Idiomsin the air, being talked about:An interesting rumor is in the air.
  3. Idiomsoff the air, not broadcasting or being broadcast:Suddenly the station went off the air.
  4. Idiomson the air, broadcasting or being broadcast:The President is on the air tonight.
  5. Idioms up in the air, not decided;
    unsettled:Their plans are still up in the air.
  6. Idiomswalk on air, to feel very happy or elated.
air•less , adj. 
air•less•ness , n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2017
air1  (âr),USA pronunciation n. 
  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;
    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 and Dance
    • a tune;
    • the soprano or treble part.
    • an aria.
    • Also,  ayre. an Elizabethan art song.
  9. aircraft as a means of transportation:to arrive by air; to ship goods by air.
  10. Informal Termsair 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.
  13. clear the air, to eliminate dissension, ambiguity, or tension from a discussion, situation, etc.:The staff meeting was intended to help clear the air.
  14. Informal Termsget the air: 
    • to be rejected, as by a lover.
    • to be dismissed, as by an employer:He had worked only a few days when he got the air.
  15. Informal Termsgive (someone) the air: 
    • to reject, as a lover:He was bitter because she gave him the air.
    • to dismiss, as an employee.
  16. in the air, in circulation;
    current:There's a rumor in the air that we're moving to a new location.
  17. into thin air, completely out of sight or reach:He vanished into thin air.
  18. off the air: 
    • Show Businessnot broadcasting:The station goes off the air at midnight.
    • Show Businessnot broadcast;
      out of operation as a broadcast:The program went off the air years ago.
    • (of a computer) not in operation.
  19. on the air: 
    • Show Businessin the act of broadcasting;
      being broadcast:The program will be going on the air in a few seconds.
    • (of a computer) in operation.
  20. put on airs, to assume an affected or haughty manner:As their fortune increased, they began to put on airs.
  21. take the air: 
    • to go out-of-doors;
      take a short walk or ride.
    • Slang Termsto leave, esp. hurriedly.
    • to begin broadcasting.
  22. up in the air: 
    • Also,  in the air. undecided or unsettled:The contract is still up in the air.
    • Informal Termsangry;
      perturbed:There is no need to get up in the air over a simple mistake.
  23. walk or  tread on air, to feel very happy;
    be elated.

  1. to expose to the air;
    give access to the open air;
    ventilate (often fol. by out):We air the bedrooms every day.
  2. to expose ostentatiously;
    bring to public notice;
    display:to air one's opinions; to air one's theories.
  3. Show Businessto broadcast or televise.

  1. to be exposed to the open air (often fol. by out):Open the window and let the room air out.
  2. to be broadcast or televised.

  1. operating by means of air pressure or by acting upon air:an air drill; an air pump.
  2. of or pertaining to aircraft or to aviation:air industry.
  3. taking place in the air;
    aerial:air war.
airlike′, adj. 
  • Italian aria aria
  • Latin ager field (compare acre) and ārea threshing floor, clearing, area; and with (for def. 7) French air
  • Greek āer- (stem of āé̄r) the lower atmosphere; conflated with (esp. for defs. 4 and 5) French air, Old French aire nature, character
  • Latin āēr- (accusative āerem)
  • Old French air
  • Middle English eir 1150–1200
    • 2.See corresponding entry in Unabridged See  wind 1.
    • 5, 6.See corresponding entry in Unabridged impression, aspect.
    • 6.See corresponding entry in Unabridged aura, demeanor, attitude. See  manner1. 

air2  (âr),USA pronunciation [Scot.]
  1. Scottish Termsearly.

  1. Scottish Terms[Obs.]before;
  • see ere

A•ïr  ēr),USA pronunciation n. 
  1. Place Namesa region in N Niger, in the Sahara: low massif and oases. ab. 30,000 sq. mi. (77,700 sq. km). Also called  Asben. 

  • Abbreviationsartist-in-residence.

  • WordReference Random House Unabridged Dictionary of American English © 2017
  • Abbreviationsartist-in-residence.

  • Collins Concise English Dictionary © HarperCollins Publishers::

    air /ɛə/ n
    1. the mixture of gases that forms the earth's atmosphere. At sea level dry air has a density of 1.226 kilograms per cubic metre and consists of 78.08 per cent nitrogen, 20.95 per cent oxygen, 0.93 per cent argon, 0.03 per cent carbon dioxide, with smaller quantities of ozone and inert gases; water vapour varies between 0 and 4 per cent and in industrial areas sulphur gases may be present as pollutants
    2. the space above and around the earth; sky
      Related adjective(s): aerial
    3. breeze; slight wind
    4. public expression; utterance
    5. a distinctive quality: an air of mystery
    6. a person's distinctive appearance, manner, or bearing
    7. a simple tune for either vocal or instrumental performance
    8. transportation in aircraft (esp in the phrase by air)
    9. an archaic word for breath, breath, breath
    10. in the airin circulation; current
    11. in the process of being decided; unsettled
    12. into thin airleaving no trace behind
    13. off the airnot in the act of broadcasting or being broadcast on radio or television
    14. on the airin the act of broadcasting or being broadcast on radio or television
    15. take the airto go out of doors, as for a short walk or ride
    16. up in the airuncertain
    17. informal agitated or excited
    18. (modifier) of or relating to a group of three signs of the zodiac, Gemini, Libra, and Aquarius
    1. to expose or be exposed to the air so as to cool or freshen; ventilate
    2. to expose or be exposed to warm or heated air so as to dry: to air linen
    3. (transitive) to make known publicly; display; publicize: to air one's opinions
    4. (intransitive) (of a television or radio programme) to be broadcast

    See also airsEtymology: 13th Century: via Old French and Latin from Greek aēr the lower atmosphere

    Aïr /ˈɑːɪə/ n
    1. a mountainous region of N central Niger, in the Sahara, rising to 1500 m (5000 ft): a former native kingdom. Area: about 77 700 sq km (30 000 sq miles)
      Also called: Azbine, Asben

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