Source : Webster's Revised Unabridged Dictionary (1913)

Connotation \Con`no*ta"tion\, n. [Cf. F. connotation.]
   The act of connoting; a making known or designating something
   additional; implication of something more than is asserted.

Source : WordNet®

connotation
     n 1: what you must know in order to determine the reference of an
          expression [syn: {intension}]
     2: an idea that is implied or suggested