/kɹɛst/
noun
The summit of a hill or mountain ridge.A tuft, or other natural ornament, growing on an animal's head, for example the comb of a cockerel, the swelling on the head of a snake, the lengthened feathers of the crown or nape of bird, etc.The plume of feathers, or other decoration, worn on or displayed on a helmet; the distinctive ornament of a helmet.A bearing worn, not upon the shield, but usually on a helmet above it, sometimes (as for clerics) separately above the shield or separately as a mark for plate, in letterheads, and the like.The upper curve of a horse's neck.The ridge or top of a wave.The helm or head, as typical of a high spirit; pride; courage.The ornamental finishing which surmounts the ridge of a roof, canopy, etc.The top line of a slope or embankment.A ridge along the surface of a bone.A design or logo, especially one of an institution, association or high-class family.Any of several birds in the family Regulidae, including the goldcrests and firecrests.verb
Particularly with reference to waves, to reach a peak.To reach the crest of (a hill or mountain)To furnish with, or surmount as, a crest; to serve as a crest for.To mark with lines or streaks like waving plumes.