n. the top line of a hill, mountain, or wave
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. reach a high point
n. 冠, 饰毛, 头盔的顶部
vi. 到达绝顶
vt. 加以顶饰