'Pumpernickel' definitions:

Definition of 'pumpernickel'

(from WordNet)
noun
Bread made of coarse rye flour [syn: black bread, pumpernickel]

Definition of 'Pumpernickel'

From: GCIDE
  • Pumpernickel \Pump"er*nick`el\, n. [G.] A sort of bread, made of unbolted rye, which forms the chief food of the Westphalian peasants. It is acid but nourishing. [1913 Webster]