The Collaborative International Dictionary of English v.0.48:

Enliven \En*liv"en\, v. t. [imp. & p. p. Enlivened; p. pr. &
   vb. n. Enlivening.] [Pref. en- + liven.].
   1. To give life, action, or motion to; to make vigorous or
      active; to excite; to quicken; as, fresh fuel enlivens a
      fire.
      [1913 Webster]

            Lo! of themselves th' enlivened chessmen move.
                                                  --Cowley.
      [1913 Webster]

   2. To give spirit or vivacity to; to make sprightly, gay, or
      cheerful; to animate; as, mirth and good humor enliven a
      company; enlivening strains of music.

   Syn: To animate; rouse; inspire; cheer; encourage; comfort;
        exhilarate; inspirit; invigorate.
        [1913 Webster]

WordNet (r) 3.0 (2006):

enlivened
    adj 1: made sprightly or cheerful [ant: unenlivened]
    2: made lively or spirited; "a meal enlivened by the music"; "a
       spirited debate" [syn: enlivened, spirited]

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "enlivened":
   aboveground, alive, alive and kicking, among the living, animate,
   animated, breathing, capable of life, conscious, endowed with life,
   existent, in the flesh, inspirited, instinct with life, live,
   living, long-lived, quick, tenacious of life, very much alive,
   viable, vital, vivified, zoetic