Definition of "Joke" :

noun: a ludicrous or grotesque act done for fun and amusement

noun: activity characterized by good humor

noun: a triviality not to be taken seriously

"I regarded his campaign for mayor as a joke."

noun: a humorous anecdote or remark intended to provoke laughter

"He told a very funny joke."

verb: act in a funny or teasing way

verb: tell a joke; speak humorously

"He often jokes even when he appears serious."