Crest n.
1. 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.
[Attack] his rising crest, and drive the serpent back. --C. Pitt.
2. 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.
Stooping low his lofty crest. --Sir W. Scott.
And on his head there stood upright
A crest, in token of a knight. --Gower.
3. Her. 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.
4. The upper curve of a horse's neck.
Throwing the base thong from his bending crest. --Shak.
5. The ridge or top of a wave.
Like wave with crest of sparkling foam. --Sir W. Scott.
6. The summit of a hill or mountain ridge.
7. The helm or head, as typical of a high spirit; pride; courage.
Now the time is come
That France must vail her lofty plumed crest. --Shak.
8. Arch. The ornamental finishing which surmounts the ridge of a roof, canopy, etc.
The finials of gables and pinnacles are sometimes called crests. --Parker.
9. Engin. The top line of a slope or embankment.
Crest tile, a tile made to cover the ridge of a roof, fitting upon it like a saddle.
Interior crest Fort., the highest line of the parapet.