airside

not-comparable

Into the passenger-only area of an airport, beyond security, passport/immigration, and customs controls.

Japanese Meaning

空港内で、保安検査、パスポート・入国審査、税関などの制限区域を通過し、乗客専用となっているエリア

After clearing passport control, he walked airside to find a quiet spot before boarding.

パスポート審査を終えた後、彼は搭乗前に落ち着ける場所を探すために保安検査通過後の旅客専用エリアへ向かった。

Sense（1）

Into the passenger-only area of an airport, beyond security, passport/immigration, and customs controls.

You have to go through security to go airside.