Definition for TOUGH-NESS

TOUGH-NESS, n. [tuf'ness.]

  1. The quality of a substance which renders it in some degree flexible, without brittleness or liability to fracture; flexibility with a firm adhesion of parts; as, the toughness of steel. Dryden.
  2. Viscosity; tenacity; clamminess; glutinousness; as, the toughness of mucus.
  3. Firmness; strength of constitution or texture. Shak.

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