occasion

1 occasion /əˈkeɪʒən/ noun
plural occasions
1 occasion
/əˈkeɪʒən/
noun
plural occasions
Britannica Dictionary definition of OCCASION
1 
[count] : a special event or time
2 
[count] somewhat formal : a particular time when something happens
— often used after on
3 
somewhat formal : a chance or opportunity : a situation that allows something to happen — usually followed by to + verb
[noncount]
[singular]
4 
[singular] somewhat formal : a reason to do something — often + for

on occasion

: sometimes but not often : from time to time

rise to the occasion

— see 1rise
2 occasion /əˈkeɪʒən/ verb
occasions; occasioned; occasioning
2 occasion
/əˈkeɪʒən/
verb
occasions; occasioned; occasioning
Britannica Dictionary definition of OCCASION
[+ object] formal
: to cause (something)
— often used as (be) occasioned