A pinnacle is the highest point of something, especially success or fame. PINNACLE definition: 1. the most successful or admired part of a system or achievement: 2. a small pointed tower on top…. Learn more. PINNACLE meaning: 1. the most successful or admired part of a system or achievement: 2. a small pointed tower on top…. Learn more. Pinnacle can mean a small turret or spire on a roof, a tall pointed formation, or the highest point of something. Learn more about its usage, synonyms, and translations from various sources.
