'Clinker' definitions:

Definition of 'clinker'

From: WordNet
noun
A fragment of incombustible matter left after a wood or coal or charcoal fire [syn: cinder, clinker]
noun
A hard brick used as a paving stone [syn: clinker, clinker brick]
verb
Clear out the cinders and clinker from; "we clinkered the fire frequently"
verb
Turn to clinker or form clinker under excessive heat in burning

Definition of 'Clinker'

From: GCIDE
  • Clinker \Clink"er\ (kl[i^][ng]k"[~e]r), n. [From clink; cf. D. clinker a brick which is so hard that it makes a sonorous sound, from clinken to clink. Cf. Clinkstone.]
  • 1. A mass composed of several bricks run together by the action of the fire in the kiln. [1913 Webster]
  • 2. Scoria or vitrified incombustible matter, formed in a grate or furnace where anthracite coal in used; vitrified or burnt matter ejected from a volcano; slag. [1913 Webster]
  • 3. A scale of oxide of iron, formed in forging. [1913 Webster]
  • 4. A kind of brick. See Dutch clinker, under Dutch. [1913 Webster]