Source : Webster's Revised Unabridged Dictionary (1913)

Discard \Dis*card"\, v. i. (Card Playing)
   To make a discard.

Discard \Dis*card"\, n. (Card Playing)
   The act of discarding; also, the card or cards discarded.

Discard \Dis*card"\, v. t. [imp. & p. p. {Discarded}; p. pr. &
   vb. n. {Discarding}.]
   1. (Card Playing) To throw out of one's hand, as superfluous
      cards; to lay aside (a card or cards).

   2. To cast off as useless or as no longer of service; to
      dismiss from employment, confidence, or favor; to
      discharge; to turn away.

            They blame the favorites, and think it nothing
            extraordinary that the queen should . . . resolve to
            discard them.                         --Swift.

   3. To put or thrust away; to reject.

            A man discards the follies of boyhood. --I. Taylor.

   Syn: To dismiss; displace; discharge; cashier.

Source : WordNet®

discard
     n 1: anything that is cast aside or discarded
     2: (cards) the act of throwing out a useless card or to failing
        to follow suit
     3: getting rid something that is regarded as useless or
        undesirable [syn: {throwing away}]
     v : throw or cast away; "Put away your worries" [syn: {fling}, {toss},
          {toss out}, {toss away}, {chuck out}, {cast aside}, {dispose},
          {throw out}, {cast out}, {throw away}, {cast away}, {put
         away}]