gag in WordNet English dictionary

1. cause to retch or choke
   gag  choke 
   
2. struggle for breath; have insufficient oxygen intake
   "he swallowed a fishbone and gagged"
   gag  choke  strangle  suffocate 
   
3. be too tight; rub or press
   "This neckband is choking the cat"
   choke  gag  fret 
   
4. make an unsuccessful effort to vomit; strain to vomit
   gag  heave  retch 
   
5. make jokes or quips
   "The students were gagging during dinner"
   gag  quip 
   
6. tie a gag around someone's mouth in order to silence them
   "The burglars gagged the home owner and tied him to a chair"
   gag  muzzle 
   
7. prevent from speaking out
   "The press was gagged"
   gag  muzzle 
   

1. restraint put into a person's mouth to prevent speaking or shouting
   gag  muzzle 
   
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