1. n. 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.
2. n. The plume of feathers, or other decoration, worn on or displayed on a helmet; the distinctive ornament of a helmet.
3. n. (heraldry) 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
4. n. The upper curve of a horse's neck.
5. n. The ridge or top of a wave.
6. n. The summit of a hill or mountain ridge.
7. n. The helm or head, as typical of a high spirit; pride; courage.
8. n. The ornamental finishing which surmounts the ridge of a roof, canopy, etc.
9. n. The top line of a slope or embankment.
10. n. (anatomy) A ridge along the surface of a bone.
11. n. (informal) A design or logo, especially one of an institution, association or high-class family.
12. n. Any of several birds in the family Regulidae, including the goldcrests and firecrests.
13. v. Particularly with reference to waves, to reach a peak.
14. v. To furnish with, or surmount as, a crest; to serve as a crest for.
15. v. To mark with lines or streaks like waving plumes.
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