'Copula' definitions:

Definition of 'copula'

From: WordNet
noun
An equating verb (such as `be' or `become') that links the subject with the complement of a sentence [syn: copula, copulative, linking verb]

Definition of 'Copula'

From: GCIDE
  • Copula \Cop"u*la\, n. [L., bond, band. See Couple.]
  • 1. (Logic & Gram.) The word which unites the subject and predicate. [1913 Webster]
  • 2. (Mus.) The stop which connects the manuals, or the manuals with the pedals; -- called also coupler. [1913 Webster]