Veto \Ve"to\, v. t. [imp. & p. p. {Vetoed} (v[=e]"t[=o]d); p.
pr. & vb. n. {Vetoing}.]
To prohibit; to negative; also, to refuse assent to, as a
legislative bill, and thus prevent its enactment; as, to veto
an appropriation bill.
[1913 Webster]