Meaning of “outside” - Learner’s Dictionary

outside

adverb uk us /ˌaʊtˈsaɪd/
NOT INSIDE

A1 not inside a building:

Go and play outside for a while.
It's cold outside today.
NEAR

A2 not in a particular building or room, but near it:

She knocked on his bedroom door and left the tray outside.

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