The Collaborative International Dictionary of English v.0.48:

Consensus \Con*sen"sus\, n. [L. See Consent.]
   Agreement; accord; consent.
   [1913 Webster]

         That traditional consensus of society which we call
         public opinion.                          --Tylor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

consensus
    n 1: agreement in the judgment or opinion reached by a group as
         a whole; "the lack of consensus reflected differences in
         theoretical positions"; "those rights and obligations are
         based on an unstated consensus"

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "consensus":
   acclamation, accord, accordance, agreement, agreement of all,
   chorus, common assent, common consent, concert, concord,
   concordance, concurrence, confluence of minds, consensus gentium,
   consensus of opinion, consensus omnium, consent, consentaneity,
   general acclamation, general agreement, general consent,
   general voice, harmony, like-mindedness, meeting of minds,
   mutual understanding, one accord, one voice, same mind,
   single voice, total agreement, unanimity, unanimousness,
   understanding, unison, universal agreement