The Collaborative International Dictionary of English v.0.48:

Jubilate \Ju`bi*la"te\, n. [L., imperat. of jubilare to shout
   for joy.]
   [1913 Webster]
   1. The third Sunday after Easter; -- so called because the
      introit is the 66th Psalm, which, in the Latin version,
      begins with the words, "Jubilate Deo."
      [1913 Webster]

   2. A name of the 100th Psalm; -- so called from its opening
      word in the Latin version.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Jubilate \Ju"bi*late\, v. i. [L. jubilatus, p. p. of jubilare.]
   To exult; to rejoice. [R.] --De Quincey.
   [1913 Webster]

WordNet (r) 3.0 (2006):

jubilate
    v 1: celebrate a jubilee
    2: to express great joy; "Who cannot exult in Spring?" [syn:
       exuberate, exult, rejoice, triumph, jubilate]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "jubilate":
   beat the drum, blow the trumpet, caper, caracole, carol, celebrate,
   chirp, chirrup, clap hands, commemorate, crow, crow over, dance,
   delight, dress ship, exult, fire a salute, frisk, frolic, gambol,
   gloat, gloat over, glory, hallow, hold jubilee, honor, joy,
   jubilize, keep, lilt, maffick, make merry, mark, memorialize,
   observe, rejoice, revel, rollick, romp, signalize, sing, skip,
   skip for joy, solemnize, solemnly mark, sound a fanfare, triumph,
   whistle