n the top line of a hill, mountain, or wave
n the top or extreme point of something (usually a mountain or hill)
n the center of a cambered road
n (heraldry) in medieval times, an emblem used to decorate a helmet
n a showy growth of e.g. feathers or skin on the head of a bird or other animal
v lie at the top of
v reach a high point
v. 到达山顶(或浪峰)( crest的第三人称单数 ); 到达洪峰, 达到顶点