restraint put into a person''s mouth to prevent speaking or shouting;
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 hisown jest"; "even a schoolboy''s jape is supposed to have some ascertainable point";
make an unsuccessful effort to vomit; strain to vomit;
cause to retch or choke;
struggle for breath; have insufficient oxygen intake; "he swallowed a fishbone and gagged";
make jokes or quips; "The students were gagging during dinner";
tie a gag around someone''s mouth in order to silence them; "The burglars gagged the home owner and tied him to a chair";
be too tight; rub or press; "This neckband is choking the cat";
prevent from speaking out; "The press was gagged";