Read the dictionary definition of crest. All definitions for this word.
1. a showy growth of e.g. feathers or skin on the head of a bird or other animal
2. (heraldry) in medieval times, an emblem used to decorate a helmet
3. the center of a cambered road
4. the top line of a hill, mountain, or wave
5. the top or extreme point of something (usually a mountain or hill)
1. the view from the peak was magnificent
2. they clambered to the tip of Monadnock
3. the region is a few molecules wide at the summit
6. reach a high point
1. The river crested last night
7. lie at the top of
1. Snow capped the mountains