[Latin exsultāre : ex-, ex- + saltāre, to dance, frequentative of salīre, to leap; see sel- in Indo-European roots.] ex·ul'tance, ex·ul'tan·cy n., ex·ult'ing·ly adv.
c.1425, from M.Fr. exulter, from L. exultare, frequentative of exsilire "leap out or up," from ex- "forth" + salire "to leap" (see salient). Notion is of leaping or dancing for joy. Exult in the sense of "rejoice exceedingly" is from 1594.