Webster's Revised Unabridged Dictionary · 1913

Discard

Discard , transitive verb

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

Discard , intransitive verb

(Card Playing) To make a discard.

Discard , noun

(Card Playing) The act of discarding; also, the card or cards discarded.