Source : Webster's Revised Unabridged Dictionary (1913)

Rejoicing \Re*joi"cing\ (-s?ng), n.
   1. Joy; gladness; delight.

            We should particularly express our rejoicing by love
            and charity to our neighbors.         --R. Nelson.

   2. The expression of joy or gladness.

            The voice of rejoicing and salvation is in the
            tabernacles of the righteous.         --Ps. cxviii.
                                                  15.

   3. That which causes to rejoice; occasion of joy.

            Thy testimonies have I taken as an heritage forever,
            for they are the rejoicing of my heart. --Ps. cxix.
                                                  111.

Rejoice \Re*joice"\ (r[-e]*jois"), v. i. [imp. & p. p.
   {Rejoiced} (-joist"); p. pr. & vb. n. {Rejoicing}
   (-joi"s?ng).] [OE. rejoissen, OF. resjouir, resjoir, F.
   r['e]jouir; pref. re- re- + OF, esjouir, esjoir, F.
   ['e]jouir, to rejoice; pref. es- (L. ex-) + OF. jouir, joir,
   F. jouir, from L. gaudere to rejoice. See {Joy}.]
   To feel joy; to experience gladness in a high degree; to have
   pleasurable satisfaction; to be delighted. ``O, rejoice
   beyond a common joy.'' --Shak.

         I will be glad and rejoice in thy mercy. --Ps. xxxi. 7.

   Syn: To delight; joy; exult; triumph.

Source : WordNet®

rejoicing
     adj : joyful and proud especially because of triumph or success;
           "rejoicing crowds filled the streets on VJ Day"; "a
           triumphal success"; "a triumphant shout" [syn: {exultant},
            {exulting}, {jubilant}, {prideful}, {triumphal}, {triumphant}]

rejoicing
     n 1: a feeling of great happiness
     2: the utterance of sounds expressing great joy [syn: {exultation},
         {jubilation}]