landside

land +‎ -side

landside (not comparable)

1. Inland; away from the sea.
2. In the freely-accessible area of an airport, outside of security, passport/immigration, and customs control.

   I had to remain landside because I did not have a boarding card.

(antonym(s) of “outside the secure zone of an airport”):

• airside

landside (plural landsides)

1. The flat bottom part of a plough.
2. The freely-accessible area of an airport, outside of security, passport/immigration, and customs control.

(antonym(s) of “non-secure zone of an airport”):

• airside

• Dinsdale, islanded