noun
The physical place where you leave a building, station, or enclosed area. Often contrasted with 入り口 (entrance).
See also: 入り口
駅の出口はどこですか。
Where is the station exit?
非常口は
The emergency exit is that way.
noun
An opening or passage through which something (air, water, smoke, etc.) escapes or is released. Often used in compound words like 排気口 or 排水口, but 出口 alone can carry this meaning in context.
このパイプは煙の出口です。
This pipe is the smoke outlet.