Source : Webster's Revised Unabridged Dictionary (1913)

Boy \Boy\, n.
   In various countries, a male servant, laborer, or slave of a
   native or inferior race; also, any man of such a race.

         He reverted again and again to the labor difficulty,
         and spoke of importing boys from Capetown. --Frances
                                                  Macnab.

Boy \Boy\, v. t.
   To act as a boy; -- in allusion to the former practice of
   boys acting women's parts on the stage.

         I shall see Some squeaking Cleopatra boy my greatness.
                                                  --Shak.

Boy \Boy\, n. [Cf. D. boef, Fries. boi, boy; akin to G. bube,
   Icel. bofi rouge.]
   A male child, from birth to the age of puberty; a lad; hence,
   a son.

         My only boy fell by the side of great Dundee. --Sir W.
                                                  Scott.

   Note: Boy is often used as a term of comradeship, as in
         college, or in the army or navy. In the plural used
         colloquially of members of an associaton, fraternity,
         or party.

   {Boy bishop}, a boy (usually a chorister) elected bishop, in
      old Christian sports, and invested with robes and other
      insignia. He practiced a kind of mimicry of the ceremonies
      in which the bishop usually officiated.

   {The Old Boy}, the Devil. [Slang]

   {Yellow boys}, guineas. [Slang, Eng.]

   {Boy's love}, a popular English name of Southernwood
      ({Artemisia abrotonum}); -- called also {lad's love}.

   {Boy's play}, childish amusements; anything trifling.

Source : WordNet®

boy
     n 1: a youthful male person; "the baby was a boy"; "she made the
          boy brush his teeth every night"; "most soldiers are
          only boys in uniform" [syn: {male child}] [ant: {female
          child}, {female child}]
     2: a friendly informal reference to a grown man; "he likes to
        play golf with the boys"
     3: a male human offspring; "their son became a famous judge";
        "his boy is taller than he is" [syn: {son}] [ant: {daughter},
         {daughter}]
     4: (ethnic slur) offensive term for Black man; "get out of my
        way, boy"