Meaning of “gate” - Learner’s Dictionary

gate

noun [ C ] uk us /ɡeɪt/
DOOR

A2 the part of a fence or outside wall that opens and closes like a door:

Please shut the gate.
AIRPORT

B1 the part of an airport where passengers get on or off an aircraft:

The flight to Dublin is now boarding at gate 8.

(Definition of “gate” from the Cambridge Learner’s Dictionary © Cambridge University Press)