Source : Webster's Revised Unabridged Dictionary (1913)

Congruence \Con"gru*ence\, n. [L. congruentia: cf. OF.
   cornguence.]
   Suitableness of one thing to another; agreement; consistency.
   --Holland.

Source : WordNet®

congruence
     n : the quality of agreeing; being suitable and appropriate
         [syn: {congruity}, {congruousness}] [ant: {incongruity},
         {incongruity}]