Of or relating to a quantity less than zero, Of or relating to a quantity, number, angle, velocity, or direction in a sense opposite to another of the same magnitude indicated or understood to be positive, Of or relating to a body that has more electrons than protons, noun_ A statement or act indicating or expressing a contradiction, denial, or refusal, Something that lacks all positive, affirmative, or encouraging features; an element that is the counterpoint of the positive, A film, plate, or other photographic material containing such an image, transitive verb_ To refuse to approve; veto, To demonstrate to be false; disprove, To counteract or neutralize