Crest

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.

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.