From WordNet (r) 3.0 (2006):
crest
n 1: the top line of a hill, mountain, or wave
2: the top or extreme point of something (usually a mountain or
hill); "the view from the peak was magnificent"; "they
clambered to the tip of Monadnock"; "the region is a few
molecules wide at the summit" [syn: peak, crown, crest,
top, tip, summit]
3: the center of a cambered road [syn: crown, crest]
4: (heraldry) in medieval times, an emblem used to decorate a
helmet
5: a showy growth of e.g. feathers or skin on the head of a bird
or other animal
v 1: lie at the top of; "Snow capped the mountains" [syn: cap,
crest]
2: reach a high point; "The river crested last night"