Definitions of clinch:

• noun:   (boxing) the act of one boxer holding onto the other to avoid being hit and to rest momentarily
• noun:   the flattened part of a nail or bolt or rivet
• noun:   a small slip noose made with seizing
• noun:   a tight or amorous embrace
• verb:   settle conclusively

  Example: "Clinch a deal"

• verb:   flatten the ends (of nails and rivets)

  Example: "The nails were clinched"

• verb:   secure or fasten by flattening the ends of nails or bolts

  Example: "The girder was clinched into the wall"

• verb:   embrace amorously
• verb:   hold a boxing opponent with one or both arms so as to prevent punches
• verb:   hold in a tight grasp
• name:  A surname (very rare: popularity rank in the U.S.: #25726)