Whitecap

1.

The European redstart; -- so called from its white forehead.

2.

The whitethroat; -- so called from its gray head.

3.

The European tree sparrow.

4.

A wave whose crest breaks into white foam, as when the wind is freshening.

5.

A member of a self-appointed vigilance committee attempting by lynch-law methods to drive away or coerce persons obnoxious to it. Some early ones wore white hoods or masks.