Source : Webster's Revised Unabridged Dictionary (1913)

Abundant \A*bun"dant\, a. [OE. (h)abundant, aboundant, F.
   abondant, fr. L. abudans, p. pr. of abundare. See {Abound}.]
   Fully sufficient; plentiful; in copious supply; -- followed
   by in, rarely by with. ``Abundant in goodness and truth.''
   --Exod. xxxiv. 6.

   {Abundant number} (Math.), a number, the sum of whose aliquot
      parts exceeds the number itself. Thus, 1, 2, 3, 4, 6, the
      aliquot parts of 12, make the number 16. This is opposed
      to a {deficient} number, as 14, whose aliquot parts are 1,
      2, 7, the sum of which is 10; and to a {perfect} number,
      which is equal to the sum of its aliquot parts, as 6,
      whose aliquot parts are 1, 2., 3.

   Syn: Ample; plentiful; copious; plenteous; exuberant;
        overflowing; rich; teeming; profuse; bountiful; liberal.
        See {Ample}.

Source : WordNet®

abundant
     adj : present in great quantity; "an abundant supply of water"
           [ant: {scarce}]