Definition of: joke

(jōk) noun
1. Something said or done for the purpose of creating amusement; a jest.
2. A subject of merriment.
3. Something not said or done in earnest; sport. See synonyms under WIT.
—v. joked, jok·ing v.t. To make merry with.
—v.i. To make jokes; jest. [<L jocus]
—jok′ing·ly adverb