to put aside, send back, throw away, (something) as not good enough; to refuse to accept (a person, thing)
say no to
Cases of word usage
1) to end, reject (something) as not valid (by legal procedure) (quash)
2) a constitutional right of a sovereign, president, legislative assembly or other body, or a member of the United Nations Security Council, to reject of forbid something; statement that rejects or prohibits something (veto)