airless

from WordNet (r) 3.0 (2006)

airless
    adj 1: lacking fresh air; "a dusty airless attic"; "the
           dreadfully close atmosphere"; "hot and stuffy and the air
           was blue with smoke" [syn: {airless}, {close}, {stuffy},
           {unaired}]

from The Collaborative International Dictionary of English v.0.48

Airless \Air"less\, a.
   Not open to a free current of air; wanting fresh air, or
   communication with the open air.
   [1913 Webster]

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