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Definition of Airspace
1. Noun. The space in the atmosphere immediately above the earth.
2. Noun. The atmosphere above a nation that is deemed to be under its jurisdiction. "The plane was refused permission to enter Chinese airspace"
Definition of Airspace
1. the portion of the atmosphere above a particular land area [n -S]
Medical Definition of Airspace
1. Pertaining to the portion of the lung distal to the conducting airways or bronchi; alveolar. (05 Mar 2000)