1. the highest points or tops of hills, mountains, or waves
2. decorative plumes or tufts of feathers on the heads of birds or animals
3. heraldic designs or emblems used as symbols of families, organizations, or institutions

1. reaches the highest point or level

Examples

• The mountain crests were covered in snow.
• Large waves crashed over the ship’s crests.
• The rooster’s red crest stood upright when he crowed.
• The university crests were displayed on all official documents.
• Family crests often feature animals and symbols.
• The flood crests at midnight according to weather reports.
• Her popularity crests during election season.
• The wave crests just before it breaks on the shore.