What does the word clench mean?

Usage examples for clench

  1. The young man saw the girl's hands clench, saw her face grow slowly pale. – The Coming of the Law by Charles Alden Seltzer
  2. He then proceeds to prove again his already proved position, and thus to clench his argument. – The Doctrines of Predestination, Reprobation, and Election by Robert Wallace
  3. When Lucy began to play clench- dummy with her own life, with her husband's love, and with the institution of marriage, Fulton, I think, would have made no mistake if he had stripped her to the skin and taken a great whip to her. – We Three by Gouverneur Morris
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