clunch noun 1verb 1forms 3 noun1 •(UK) A traditional building material mostly made of chalk or clay.The manor-house stands near the church, and is a large convenient old house built of clunch, stone, &c. with good gardens and walks adjoining to the river side. — 1736 verb1 •To grasp firmly; clench.As William Wallace felt the bank giving away under his feet, he clunched the other boy firmly by the arm. — 1920 formsclunched · clunching · clunches