Source : Webster's Revised Unabridged Dictionary (1913)

Caper \Ca"per\, n. [F. c[^a]pre, fr. L. capparis, Gr. ?; cf. Ar.
   & Per. al-kabar.]
   1. The pungent grayish green flower bud of the European and
      Oriental caper ({Capparis spinosa}), much used for
      pickles.

   2. (Bot.) A plant of the genus {Capparis}; -- called also
      {caper bush}, {caper tree}.

   Note: The {Capparis spinosa} is a low prickly shrub of the
         Mediterranean coasts, with trailing branches and
         brilliant flowers; -- cultivated in the south of Europe
         for its buds. The {C. sodada} is an almost leafless
         spiny shrub of central Africa (Soudan), Arabia, and
         southern India, with edible berries.

   {Bean caper}. See {Bran caper}, in the {Vocabulary}.

   {Caper sauce}, a kind of sauce or catchup made of capers.

Caper \Ca"per\, v. i. [imp. & p. p. {Capered} p. pr. & vb. n.
   {capering}.] [From older capreoll to caper, cf. F. se cabrer
   to prance; all ultimately fr. L. caper, capra, goat. See
   {Capriole}.]
   To leap or jump about in a sprightly manner; to cut capers;
   to skip; to spring; to prance; to dance.

         He capers, he dances, he has eyes of youth. --Shak.

Caper \Ca"per\, n.
   A frolicsome leap or spring; a skip; a jump, as in mirth or
   dancing; a prank.

   {To cut a caper}, to frolic; to make a sportive spring; to
      play a prank. --Shak.

Caper \Ca"per\, n. [D. kaper.]
   A vessel formerly used by the Dutch, privateer. --Wright.

Source : WordNet®

caper
     n 1: any of numerous plants of the genus Capparis
     2: pickled flower buds used as a pungent relish in various
        dishes and sauces
     3: a crime (especially a robbery); "the gang pulled off a bank
        job in St. Louis" [syn: {job}]
     4: a ludicrous or grotesque act done for fun and amusement
        [syn: {antic}, {joke}, {prank}, {trick}, {put-on}]
     5: a playful leap or hop [syn: {capriole}]
     6: gay or light-hearted recreational activity for diversion or
        amusement; "it was all done in play"; "their frolic in the
        surf threatened to become ugly" [syn: {play}, {frolic}, {romp},
         {gambol}]

caper
     v : jump about playfully