The Collaborative International Dictionary of English v.0.48:

Lad \Lad\ (l[a^]d), n. [OE. ladde, of Celtic origin; cf. W.
   llawd, Ir. lath. [root]123. Cf. Lass.]
   1. A boy; a youth; a stripling. "Cupid is a knavish lad."
      --Shak.
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            There is a lad here, which hath five barley loaves
            and two small fishes.                 --John vi. 9.
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   2. A companion; a comrade; a mate.
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   Lad's love. (Bot.) See Boy's love, under Boy.
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The Collaborative International Dictionary of English v.0.48:

Boy \Boy\, n. [Cf. D. boef, Fries. boi, boy; akin to G. bube,
   Icel. bofi rouge.]
   1. A male child, from birth to the age of puberty; a lad;
      hence, a son.
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            My only boy fell by the side of great Dundee. --Sir
                                                  W. Scott.
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   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.
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   2. In various countries, a male servant, laborer, or slave of
      a native or inferior race; also, any man of such a race;
      -- considered derogatory by those so called, and now
      seldom used. [derog.]

            He reverted again and again to the labor difficulty,
            and spoke of importing boys from Capetown. --Frances
                                                  Macnab.
      [Webster 1913 Suppl.]

   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.
      [1913 Webster]