Whitecap

·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.