What is the meaning of Joker?

A person who makes jokes.

A funny person.

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.

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

An unspecified, vaguely disreputable person.

A man.

A clause in a contract that undermines its apparent provisions.

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

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

joker (playing card)

any wild card or similar, even in non-card games

joker (playing card)

alternative spelling of dżoker

alternative form of jóquer

joker, trump card, something kept in reserve that can be used to gain an advantage

Source: wiktionary.org

See also