Definition of grand slam
1 : the winning of all the tricks in one hand of a card game (as bridge)
2 : a clean sweep or total success; specifically : the winning of all the major or specified tournaments on a tour twice won the tennis grand slam
3 : a home run hit with the bases loaded
Examples of grand slam in a sentence
He made a grand slam.
First Known Use of grand slam
Learn More about grand slam
Seen and Heard
What made you want to look up grand slam? Please tell us where you read or heard it (including the quote, if possible).