·noun The European tree sparrow.
II. Whitecap ·noun The whitethroat;
- so called from its gray head.
III. Whitecap ·noun The European redstart;
- so called from its white forehead.
IV. Whitecap ·noun A wave whose crest breaks into white foam, as when the wind is freshening.
V. Whitecap ·add. ·noun 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.