Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: French
Origin: Latin occasio, from occidere 'to fall down'

occasion

1 noun
     
oc‧ca‧sion1 S1 W2
1

time

a) [countable] a time when something happens
on ... occasion
I've seen Jana with them on several occasions.
On this occasion we were sitting in a park in Madrid.
She had met Zahid on two separate occasions.
b) [singular] a suitable or favourable time
occasion for
This was the occasion for expressions of friendship by the two presidents.
! Do not use occasion when you mean 'a time when it is possible for you to do what you want to do'. Use opportunity or chance: Do not waste this opportunity (NOT this occasion).
2

special event

[countable] an important social event or ceremony:
I'm saving this bottle of champagne for a special occasion.
They presented him with a gift to mark the occasion (=celebrate it).
occasion of
His funeral was a great occasion of public mourning.
3

cause/reason

[uncountable] formal a cause or reason:
His remark was the occasion of a bitter quarrel.
I had occasion to call on him last year.
4

if (the) occasion arises

formal if a particular action ever becomes necessary:
If ever the occasion arises when I want advice, you're the first person I'll come to.
5

on occasion

sometimes but not often:
On occasion prisoners were allowed visits from their families.
6

on the occasion of something

formal at the time of an important event:
on the occasion of his second wedding

➔ rise to the occasion

at rise1 (9)

; ➔ a sense of occasion

at sense1 (1)
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