Pronunciation: (klin'chur), [key]
1. a person or thing that clinches.
2. a statement, argument, fact, situation, or the like, that is decisive or conclusive: The heat was the clincher that made us decide to leave the city.
3. a nail, screw, etc., for clinching.
4. Auto.a clincher tire.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.