(sometimes initial capital letters) a member of an organization of boys (Boy Scouts) founded in England in 1908 by Lieut. Gen. Sir Robert S. S. Baden-Powell, that seeks to develop certain skills in its members, as well as character, self-reliance, and usefulness to others.
a member of any similar society elsewhere.
Sometimes Disparaging. a person whose good deeds, obligingness, idealism, etc., exceed normal expectations.