Meaning of grand slam

grand' slam'

Pronunciation: [key]
  1. the winning of all thirteen tricks of a deal. Cf. little slam.
  2. a home run with three runners on base.
  3. the winning by a single player of several designated major championship contests in one season, as in golf or tennis.
  4. any sweeping success or total victory.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.