What is the meaning of joke?

noun

• A humorous anecdote or remark intended to provoke laughter.
  • usage: "he told a very funny joke"; "he knows a million gags"; "thanks for the laugh"; "he laughed unpleasantly at his own jest"; "even a schoolboy's jape is supposed to have some ascertainable point"
  • synonyms: gag, laugh, jest, jape
• Activity characterized by good humor.
  • synonyms: jest, jocularity
• A ludicrous or grotesque act done for fun and amusement.
  • synonyms: antic, prank, trick, caper, put-on
• A triviality not to be taken seriously.
  • usage: "I regarded his campaign for mayor as a joke"

verb

• Tell a joke; speak humorously.
  • usage: "He often jokes even when he appears serious"
  • synonyms: jest
• Act in a funny or teasing way.
  • synonyms: jest