Source : Webster's Revised Unabridged Dictionary (1913)

Pleader \Plead"er\, n. [F. plaideur.]
   1. One who pleads; one who argues for or against; an
      advotate.

            So fair a pleader any cause may gain. --Dryden.

   2. (Law) One who draws up or forms pleas; the draughtsman of
      pleas or pleadings in the widest sense; as, a special
      pleader.

Source : WordNet®

pleader
     n : a lawyer who pleads cases in court [syn: {advocate}, {counsel},
          {counselor}, {counsellor}, {counselor-at-law}]