clincher
clinc·her
noun
1.
an argument that is conclusive
2.
a point or fact or remark that settles something conclusively
Origin
From clinch + -er.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.