occasion

1. A favorable opportunity; a convenient or timely chance. (countable, uncountable) · At this point, she seized the occasion to make her own observation.
2. The time when something happens. (countable, uncountable) · On this occasion, I'm going to decline your offer, but next time I might agree.
3. An occurrence or state of affairs which causes some event or reaction; a motive or reason. (countable, uncountable) · I had no occasion to feel offended, however.
4. Something which causes something else; a cause. (countable, uncountable)
5. A particular happening; an instance or time when something occurred. (countable, uncountable) · I could think of two separate occasions when she had deliberately lied to me.· a momentous occasion in the history of South Africa
6. A need; requirement, necessity. (countable, uncountable) · I have no occasion for firearms.
7. A special event or function. (countable, uncountable) · Having people round for dinner was always quite an occasion at our house.
8. A reason or excuse; a motive; a persuasion. (countable, uncountable)

Plural occasions