Whitecap /(?)/

White·cap

Whitecap

n.
  1. The European redstart; -- so called from its white forehead. (Zool.)
  2. A wave whose crest breaks into white foam, as when the wind is freshening.
  3. 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. [U. S.]