'Peanut butter' definitions:

Definition of 'peanut butter'

From: WordNet
noun
A spread made from ground peanuts

Definition of 'Peanut butter'

From: GCIDE
  • Peanut butter \Pea"nut but"ter\ A paste made by mixing ground fresh roasted peanuts with a small quantity of water or oil, and used chiefly as a relish on sandwiches, etc. [Webster 1913 Suppl.]