Source : Webster's Revised Unabridged Dictionary (1913)

Smart \Smart\, a. [Compar. {Smarter}; superl. {Smartest}.] [OE.
   smerte. See {Smart}, v. i.]
   1. Causing a smart; pungent; pricking; as, a smart stroke or
      taste.

            How smart lash that speech doth give my conscience.
                                                  --Shak.

   2. Keen; severe; poignant; as, smart pain.

   3. Vigorous; sharp; severe. ``Smart skirmishes, in which many
      fell.'' --Clarendon.

   4. Accomplishing, or able to accomplish, results quickly;
      active; sharp; clever. [Colloq.]

   5. Efficient; vigorous; brilliant. ``The stars shine
      smarter.'' --Dryden.

   6. Marked by acuteness or shrewdness; quick in suggestion or
      reply; vivacious; witty; as, a smart reply; a smart
      saying.

            Who, for the poor renown of being smart Would leave
            a sting within a brother's heart?     --Young.

            A sentence or two, . . . which I thought very smart.
                                                  --Addison.

   7. Pretentious; showy; spruce; as, a smart gown.

Smart \Smart\, v. i. [imp. & p. p. {Smarted}; p. pr. & vb. n.
   {Smarting}.] [OE. smarten, AS. smeortan; akin to D. smarten,
   smerten, G. schmerzen, OHG. smerzan, Dan. smerte, SW.
   sm["a]rta, D. smart, smert, a pain, G. schmerz, Ohg. smerzo,
   and probably to L. mordere to bite; cf. Gr. ????, ?????,
   terrible, fearful, Skr. m?d to rub, crush. Cf. {Morsel}.]
   1. To feel a lively, pungent local pain; -- said of some part
      of the body as the seat of irritation; as, my finger
      smarts; these wounds smart. --Chaucer. --Shak.

   2. To feel a pungent pain of mind; to feel sharp pain or
      grief; to suffer; to feel the sting of evil.

            No creature smarts so little as a fool. --Pope.

            He that is surety for a stranger shall smart for it.
                                                  --Prov. xi.
                                                  15.

Smart \Smart\, v. t.
   To cause a smart in. ``A goad that . . . smarts the flesh.''
   --T. Adams.

Smart \Smart\, n. [OE. smerte. See {Smart}, v. i.]
   1. Quick, pungent, lively pain; a pricking local pain, as the
      pain from puncture by nettles. ``In pain's smart.''
      --Chaucer.

   2. Severe, pungent pain of mind; pungent grief; as, the smart
      of affliction.

            To stand 'twixt us and our deserved smart. --Milton.

            Counsel mitigates the greatest smart. --Spenser.

   3. A fellow who affects smartness, briskness, and vivacity; a
      dandy. [Slang] --Fielding.

   4. Smart money (see below). [Canf]

Source : WordNet®

smart
     adj 1: showing mental alertness and calculation and resourcefulness
            [ant: {stupid}]
     2: elegant and stylish; "chic elegance"; "a smart new dress";
        "a suit of voguish cut" [syn: {chic}, {voguish}]
     3: characterized by quickness and ease in learning; "some
        children are brighter in one subject than another"; "smart
        children talk earlier than the average" [syn: {bright}]
     4: improperly forward or bold; "don't be fresh with me";
        "impertinent of a child to lecture a grownup"; "an
        impudent boy given to insulting strangers" [syn: {fresh},
        {impertinent}, {impudent}, {overbold}, {saucy}, {sassy}]
     5: marked by smartness in dress and manners; "a dapper young
        man"; "a jaunty red hat" [syn: {dapper}, {dashing}, {jaunty},
         {natty}, {raffish}, {rakish}, {spiffy}, {snappy}, {spruce}]

smart
     n : a kind of pain such as that caused by a wound or a burn or a
         sore [syn: {smarting}]

smart
     v : be the source of pain [syn: {ache}, {hurt}]

Source : Free On-Line Dictionary of Computing

SMART
     
        For {MS-DOS}?
     
        [{Jargon File}]

smart
     
        1.  Said of a program that does the {Right Thing}
        in a wide variety of complicated circumstances.  There is a
        difference between calling a program smart and calling it
        intelligent; in particular, there do not exist any intelligent
        programs (yet - see {AI-complete}).
     
        Compare {robust} (smart programs can be {brittle}).
     
        2.  Incorporating some kind of digital electronics.
     
        (1995-03-28)