noun
plural crests
[count] the highest part or point of something (such as a hill or wave)
usually + of
a group of decorative feathers at the top of a bird's head also; :a decorative bunch of hair on the head of another animal
a special symbol used especially in the past to represent a family, group, or organization
verb
crests; crested; cresting
[+ obj] :to reach the highest part or point of (a mountain, wave, etc.)
[no obj] US :to rise to a high level before going back down