Definition of crest

• n. - A tuft, or other excrescence or natural ornament, growing on an animal's head; the comb of a cock; the swelling on the head of a serpent; the lengthened feathers of the crown or nape of bird, etc.
• n. - The plume of feathers, or other decoration, worn on a helmet; the distinctive ornament of a helmet, indicating the rank of the wearer; hence, also, the helmet.
• n. - A bearing worn, not upon the shield, but usually above it, or separately as an ornament for plate, liveries, and the like. It is a relic of the ancient cognizance. See Cognizance, 4.
• n. - The upper curve of a horse's neck.
• n. - The ridge or top of a wave.
• n. - The summit of a hill or mountain ridge.
• n. - The helm or head, as typical of a high spirit; pride; courage.
• n. - The ornamental finishing which surmounts the ridge of a roof, canopy, etc.
• n. - The top line of a slope or embankment.
• v. t. - To furnish with, or surmount as, a crest; to serve as a crest for.
• v. t. - To mark with lines or streaks, like, or regarded as like, waving plumes.
• v. i. - To form a crest.