Meaning of “opposite” - Learner’s Dictionary

opposite

adjective uk us /ˈɒpəzɪt/
OTHER SIDE

B1 in a position facing something or someone but on the other side:

on the opposite page
in the opposite corner
We live on opposite sides of the city.
I noticed a gate at the opposite end of the courtyard.
DIFFERENT

B2 completely different:

Police attempts to calm the violence had completely the opposite effect.

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