Air

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Dictionary Meaning and Definition on 'Air'

Air Meaning and Definition from WordNet (r) 2.0
    air adj : relating to or characteristic of or occurring in the air; "air war"; "air safety"; "air travel" [syn: air(a)] [ant: land(a), sea(a)] n
  1. a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; "air pollution"; "a smell of chemicals in the air"; "open a window and let in some air"; "I need some fresh air"
  2. travel via aircraft; "air travel involves too much waiting in airports"; "if you've time to spare go by air" [syn: air travel, aviation]
  3. the region above the ground; "her hand stopped in mid air"; "he threw the ball into the air"
  4. medium for radio and television broadcasting; "the program was on the air from 9 til midnight"; "the president used the airwaves to take his message to the people" [syn: airwave]
  5. a slight wind (usually refreshing); "the breeze was cooled by the lake"; "as he waited he could feel the air on his neck" [syn: breeze, zephyr, gentle wind]
  6. a distinctive but intangible quality surrounding a person or thing; "an air of mystery"; "the house had a neglected air"; "an atmosphere of defeat pervaded the candidate's headquarters"; "the place had an aura of romance" [syn: aura, atmosphere]
  7. the mass of air surrounding the Earth; "there was great heat as the comet entered the atmosphere"; "it was exposed to the air" [syn: atmosphere]
  8. a succession of notes forming a distinctive sequence; "she was humming an air from Beethoven" [syn: tune, melody, strain, melodic line, line, melodic phrase]
  9. once thought to be one of four elements composing the universe (Empedocles) v
  10. expose to fresh air; "aerate your old sneakers" [syn: air out, aerate]
  11. be broadcast; "This show will air Saturdays at 2 P.M."
  12. broadcast over the airwaves, as in radio or television; "We cannot air this X-rated song" [syn: send, broadcast, beam, transmit]
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Wikipedia Meaning and Definition on 'Air'


The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth's gravity. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night.

Atmospheric stratification describes the structure of the atmosphere, dividing it into distinct layers, each with specific characteristics such as temperature or composition. The atmosphere has a mass of about 5×1018 kg, three quarters of which is within about 11 km (6.8 mi; 36,000 ft) of the surface. The atmosphere becomes thinner and thinner with increasing altitude, with no definite boundary between the atmosphere and outer space. An altitude of 120 km (75 mi) is where atmospheric effects become noticeable during atmospheric reentry of spacecraft. The Kármán line, at 100 km (62 mi), also is often regarded as the boundary between atmosphere and outer space.

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'Air' in famous quotation sentence


* There's so much pollution in the air now that if it weren't for our lungs there'd be no place to put it all. - Robert Orben

* The best way to keep children home is to make the home atmosphere pleasant--and let the air out of the tires. - Dorothy Parker

* A reporter is always concerned with tomorrow. There's nothing tangible of yesterday. All I can say I've done is agitate the air ten or fifteen minutes and then boom -- it's gone. - Edward R. Murrow


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