Definition of "joker" in English

noun

1. A person who makes jokes.

2. (slang) A funny person.

3. A jester.

4. A playing card that features a picture of a joker (that is, a jester) and that may be used as a wild card in some card games.

5. (figurative) Something kept in reserve that can be used to gain an advantage; a trump card.

6. An unspecified, vaguely disreputable person.

   • Some joker keeps throwing eggs at my windows.

7. (New Zealand, colloquial) A man.

8. A clause in a contract that undermines its apparent provisions.

9. (military) A friendly unit that acts as a suspected hostile unit in a military excercise.

10. The option, in a pub quiz, of selecting one particular round in which one's team will score double points.

    • We used our joker as soon as the topic of sports was announced, since we are sport experts.

11. (chess) A fairy chess piece that moves like the last piece that was moved by the opponent.