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The Collaborative International Dictionary
Whitecapper

Whitecap \White"cap`\, n.

  1. (Zo["o]l.)

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

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

    3. The European tree sparrow.

  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.] -- White"cap`, v. -- White"cap`per, n.