Meaning of “occasion” - Learner’s Dictionary

occasion

noun uk us /əˈkeɪʒən/
TIME [ C ]

B2 a time when something happens:

a previous/separate occasion
We met on several occasions to discuss the issue.
EVENT [ C ]

B1 an important event or ceremony:

a special occasion
She bought a new dress for the occasion.
on occasion(s)

sometimes, but not often:

I only drink alcohol on occasion.

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