Source : Webster's Revised Unabridged Dictionary (1913)

Lad \Lad\, 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.

            There is a lad here, which hath five barley loaves
            and two small fishes.                 --John vi. 9.

   2. A companion; a comrade; a mate.

   {Lad's love}. (Bot.) See {Boy's love}, under {Boy}.

Lad \Lad\, obs.
   p. p. of {Lead}, to guide. --Chaucer.

Source : WordNet®

lad
     n 1: a boy or man; "that chap is your host"; "there's a fellow at
          the door"; "he's a likable cuss" [syn: {chap}, {fellow},
           {feller}, {gent}, {fella}, {blighter}, {cuss}]
     2: a male child (a familiar term of address to a boy) [syn: {cub},
         {laddie}, {sonny}, {sonny boy}]