\Free"think`er\, n.
One who speculates or forms opinions independently of the
authority of others; esp., in the sphere or religion, one who
forms opinions independently of the authority of revelation
or of the church; an unbeliever; -- a term assumed by deists
and skeptics in the eighteenth century.
      Atheist is an old-fashioned word: I'm a freethinker,
      child.                                   --Addison.
Syn: Infidel; skeptic; unbeliever. See {Infidel}.