a statement that you have done something wrong, illegal, or embarrassing, especially a formal statement:
Sanchez's confession was read out to the court.
a confession of adultery
At 3 a.m. Higgins broke down and made a full confession.
I have a confession - I like Britney Spears' music.
2 [uncountable and countable]RRC
when you tell a priest or God about the bad things that you have done:
You must go to confession.
a priest who hears confession
3 [countable] formalRR
a statement of what your religious beliefs are