crestcrest /krɛst/ ●○○ noun [countable] 
1[usually singular] the top of a hill or wave: 
It took us over an hour to reach the crest of the hill.2science, biology a pointed group of feathers on top of a bird’s head
1[usually singular] the top of a hill or wave: It took us over an hour to reach the crest of the hill.2science, biology a pointed group of feathers on top of a bird’s head
