noun A person who likes making jokes.
- He's the joker of the group, always winding people up.
- Our uncle is a real joker and never misses a chance to tease us.
- Every class has a joker who makes the teacher try not to laugh.
noun A playing card, often showing a jester, used as a wild card in some games.
- She played the joker to win the final hand.
- Before dealing, he took the joker out of the pack because the game does not use it.
- In this card game, the joker can stand in for any other card.
noun A clause hidden in a contract that undermines its stated terms.
- Buried in the small print was a joker that let the landlord raise rent at will.
- The lawyer found a joker in the agreement that canceled the warranty after a month.
- Read the whole document carefully, because a joker in the final paragraph could cost you dearly.
