What is the meaning of 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.

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, sports club, association or high-class family.

Any of several birds in the family Regulidae, including the goldcrests and firecrests.

Particularly with reference to waves, to reach a peak.

To reach the crest of (e.g. 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.

to grow

Source: wiktionary.org