Crest (hydrology)
WordNet
noun
(1) A showy growth of e.g. feathers or skin on the head of a bird or other animal
(2) (heraldry) in medieval times, an emblem used to decorate a helmet
(3) The center of a cambered road
(4) The top line of a hill, mountain, or wave
(5) The top point of a mountain or hill
"The view from the peak was magnificent"
"They clambered to the summit of Monadnock"
verb
(6) Reach a high point
"The river crested last night"
(7) Lie at the top of
"Snow capped the mountains"