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tuff

Pronunciation: /tʌf/
Definition of tuff

noun

[mass noun]
  • a light, porous rock formed by consolidation of volcanic ash.

Derivatives

tuffaceous

Pronunciation: /-ˈfeɪʃəs/
adjective

Origin:

mid 16th century: via French from Italian tufo, from late Latin tofus, Latin tophus (see tophus)

tuff in other Oxford dictionaries

Definition of tuff in the US English dictionary