airspace

 : 
Noun
 : 
air=space

WORDNET DICTIONARY

Noun airspace has 2 senses

CIDE DICTIONARY

airspacen. 
     the atmosphere above a nation and deemed to be under its jurisdiction.  [WordNet 1.5]

OXFORD DICTIONARY

airspace, n. the air available to aircraft to fly in, esp. the part subject to the jurisdiction of a particular country.


For further exploring for "airspace" in Webster Dictionary Online


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