1 [uncountable and countable]MI
a period when a serious illness improves for a time
The chemotherapy was successful, and she is now in remission.
The cancer has gone into remission.
2 [uncountable and countable] British EnglishSCJ
a reduction of the time that someone has to spend in prison:
He was given six months' remission for good behaviour.
3 [uncountable] formalBFL
when you allow someone to keep the money they owe you:
remission of debts
forgiveness from God for the bad things that you have done