WHITECAP

noun the european tree sparrow.

2. whitecap ·noun the whitethroat;

— so called from its gray head.

3. whitecap ·noun the european redstart;

— so called from its white forehead.

4. whitecap ·noun a wave whose crest breaks into white foam, as when the wind is freshening.

5. 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.