A water sprite of German mythology, usually in human form or half-human and half-fish. To forbid, refuse, or veto: Congress nixed the tax hike. to answer no to something or say that you will not allow something
a quantity of no importance; "it looked like nothing I had ever seen before"; "reduced to nil all the work we had done"; "we racked up a pathetic goose egg"; "it was all for naught"; "I didn't hear zilch about it"