a comb or tuft of feathers, fur, or skin on the head of a bird or other animal.
Some males also have elegant ornamentation such as bright throat gorgets, crests and elongated tail feathers.
the top of something, especially a mountain or hill.
she reached the crest of the hill
a distinctive device borne above the shield of a coat of arms (originally as worn on a helmet), or separately reproduced, for example on writing paper or silverware, to represent a family or corporate body.
The two ornate crests represented the families of Ivor's grandfather and grandmother respectively.