1. the highest point or peak of something
2. the most successful or important point; the culmination
3. a tall, pointed structure or formation
Usage: architectural

1. to place on or as if on a pinnacle
Usage: formal

Examples

• The mountain climbers reached the pinnacle after hours of difficult hiking.
• Winning the championship was the pinnacle of her athletic career.
• The cathedral’s tall pinnacles could be seen from miles away.
• His latest novel represents the pinnacle of modern literature.
• The castle was built on a rocky pinnacle overlooking the valley.
• She had reached the pinnacle of success in her field.
• The Gothic church featured ornate stone pinnacles on each corner.