- secure or fasten by flattening the ends of nails or bolts;
"The girder was clinched into the wall"
- hold a boxing opponent with one or both arms so as to prevent punches
- hold in a tight grasp;
"clench a steering wheel"
- embrace amorously
- flatten the ends (of nails and rivets);
"the nails were clinched"
- settle conclusively;
"clinch a deal"