airside

[ air-sahyd ]
/ ˈɛərˌsaɪd /

noun

the part of an airport used by aircraft for loading and unloading and takeoffs and landings.
the area beyond security checks and passport and customs control in an airport terminal.

Origin of airside

First recorded in 1955–60; air1 + side1

British Dictionary definitions for airside

airside
/ (ˈɛəˌsaɪd) /

noun

the part of an airport nearest the aircraft, the boundary of which is the security check, customs, passport control, etc Compare landside (def. 1)