A Negative

1. Refusal or withholding of assents; prohibition, veto [from 15th c.]
2. An unfavorable point or characteristic.
3. (law) A right of veto.
4. (photography) An image in which dark areas represent light ones, and the converse. [from 19th c.]
5. (grammar) A word that indicates negation.
6. (mathematics) A negative quantity.
7. (weightlifting) A repetition performed with a weight in which the muscle begins at maximum contraction and is slowly extended; a movement performed using only the eccentric phase of muscle movement.
8. The negative plate of a voltaic or electrolytic cell.
9. (logic) A statement that something didn’t happen or doesn’t exist.