1. the pointed top of a mountain
2. the highest point or maximum level of something
3. the front part of a cap that sticks out

1. to reach the highest point or maximum level

1. at the highest level or most busy time

Examples

• The climbers reached the peak of Mount Everest.
• Traffic reaches its peak during rush hour.
• She adjusted the peak of her baseball cap.
• Sales peaked in December and then declined.
• The store charges higher prices during peak hours.
• The mountain peak was covered in snow.
• His career peaked when he won the championship.