Meaning

noun the top line of a hill, mountain, or wave

noun the top or extreme point of something (usually a mountain or hill)

noun the center of a cambered road

originFrom Middle English creste, from Old French creste (modern French crête) and perhaps continuing Old English cræsta (“crest, tuft, plume”); both ultimately from Vulgar Latin *cresta, from Latin crista. Doublet of crista. The informal meaning “design, logo” (noun sense 11) stems from a misinterpretation of the heraldic noun sense 4, which specifically refers to the object placed on top of the helm.

Etymology from Wiktionary, CC BY-SA 3.0