veto

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Rhymes with -iːtəʊ, -əʊ

From Latin vetō (“to forbid”).

A political right to disapprove of (and thereby stop) the process of a decision, a law etc.
An invocation of that right. I called Haig in and told him that I wanted to veto the agricultural appropriations bill we had discussed in the Cabinet meeting on Tuesday, because I did not want Ford to have to do it on his first day as President. Haig brought the veto statement in, and I signed it. It was the last piece of legis
An authoritative prohibition or negative; a forbidding; an interdiction. This contemptuous veto of her husband's on any intimacy with her family.
A technique or mechanism for discarding what would otherwise constitute a false positive in a scientific experiment. An outer detector (OD) region will act as both a passive shield for low energy backgrounds and an active veto for cosmic ray muons.

transitive To use a veto against. The president vetoed the bill.
transitive To countermand. Mom and Dad vetoed our menu preferences for the holiday meal.