- the highest point; summit; peak: The empire was at the acme of its power.
- the culminating point, as of achievement or excellence; summit; peak
“highest point,” 1560s, from Greek akme “(highest) point, edge; peak of anything,” from PIE root *ak- “sharp” (see acrid). Written in Greek letters until c.1620. The U.S. grocery store chain was founded 1891 in Philadelphia, Pennsylvania.