The Collaborative International Dictionary of English v.0.48:

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.
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         I will be glad and rejoice in thy mercy. --Ps. xxxi. 7.
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   Syn: Syn. To delight; joy; exult; triumph.
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