joke in WordNet English dictionary

1. a ludicrous or grotesque act done for fun and amusement
   antic  joke  prank  trick  caper  put-on 
   
2. a humorous anecdote or remark intended to provoke laughter
   "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"
   joke  gag  laugh  jest  jape 
   
3. activity characterized by good humor
   jest  joke  jocularity 
   
4. a triviality not to be taken seriously
   "I regarded his campaign for mayor as a joke"
   joke 
   

1. act in a funny or teasing way
   joke  jest 
   
2. tell a joke; speak humorously
   "He often jokes even when he appears serious"
   joke  jest