Grand slam

n.joyful, capableplayful

What it means

A complete or spectacular success that secures every major part of an objective.

Reach for it when celebrating a sweeping result where multiple wins genuinely combine

The neighborhood project scored a grand slam by adding shade, seating, access, and play space.

playful
blockbuster
large popular or commercial success is central
not when Blockbuster does not require success across every target.
playful
clean sweep
every contest or category is won
not when Clean sweep is about total coverage and may lack one spectacular decisive act.
playful
home run
American sports metaphor suits one highly successful move
not when Home run is one hit and lacks grand slam's multiplied result.
everyday
sweep
one side wins every event or category
not when Sweep can sound routine and is less emphatic than grand slam.
warm
triumph
a major success deserves dignified celebration
not when Triumph can result from one achievement rather than several combined wins.
professional
runaway success
performance clearly exceeds expectations
not when Runaway success may dominate one measure while missing others.
literary
tour de force
masterful skill creates an impressive work or performance
not when Tour de force praises execution, not necessarily a complete set of wins.

career grand slam
The athlete completed a career grand slam across four different seasons.
grand slam success
The launch was a grand slam success on access, cost, speed, and reliability.
achieve a grand slam
The coalition could achieve a grand slam only by winning every district.

Grand slam has precise meanings in baseball, card games, tennis, golf, and other sports. Verify the domain before using it literally.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.