/
ˈviːtəʊ/
n.
 (pl. vetoes)
 a constitutional right to reject a decision or proposal made by a law-making body. 
▸a ban.
v.
 (vetoes, vetoing, vetoed)
 exercise a veto against. 
▸refuse to accept or allow.
Derivative
Etymology
C17: from L., lit. ‘I forbid’, used by Roman tribunes when opposing measures of the Senate.