'Clunch' definitions:

Definition of 'clunch'

(from WordNet)
noun
Hardened clay

Definition of 'Clunch'

From: GCIDE
  • Clunch \Clunch\, n. [Perh. fr. clinch to make fast]
  • 1. (Mining) Indurated clay. See Bind, n., 3. [1913 Webster]
  • 2. One of the hard beds of the lower chalk. --Dana. [1913 Webster]