Source : Webster's Revised Unabridged Dictionary (1913)

Neat \Neat\, n. sing. & pl. [AS. ne['a]t; akin to OHG. n?z,
   Icel. naut, Sw. n["o]t, Dan. n["o]d, and to AS. ne['o]tan to
   make use of, G. geniessen, Goth. niutan to have a share in,
   have joy of, Lith. nauda use, profit.] (Zo["o]l.)
   Cattle of the genus {Bos}, as distinguished from horses,
   sheep, and goats; an animal of the genus {Bos}; as, a neat's
   tongue; a neat's foot. --Chaucer.

         Wherein the herds[men] were keeping of their neat.
                                                  --Spenser.

         The steer, the heifer, and the calf Are all called
         neat.                                    --Shak.

         A neat and a sheep of his own.           --Tusser.

   {Neat's-foot}, an oil obtained by boiling the feet of neat
      cattle. It is used to render leather soft and pliable.

Neat \Neat\, a. [See {neat}, n.]
   Of or pertaining to the genus {Bos}, or to cattle of that
   genus; as, neat cattle.

Neat \Neat\, a. [Compar. {Neater}; superl. {Neatest}.] [OE.
   nett, F. nett, fr. L. nitidus, fr. nitere to shine. Cf.
   {Nitid}, {Net}, a., {Natty}.]
   1. Free from that which soils, defiles, or disorders; clean;
      cleanly; tidy.

            If you were to see her, you would wonder what poor
            body it was that was so surprisingly neat and clean.
                                                  --Law.

   2. Free from what is unbecoming, inappropriate, or tawdry;
      simple and becoming; pleasing with simplicity; tasteful;
      chaste; as, a neat style; a neat dress.

   3. Free from admixture or adulteration; good of its kind; as,
      neat brandy. ``Our old wine neat.'' --Chapman.

   4. Excellent in character, skill, or performance, etc.; nice;
      finished; adroit; as, a neat design; a neat thief.

   5. With all deductions or allowances made; net.

   Note: [In this sense usually written {net}. See {Net}, a.,
         3.]

   {neat line} (Civil Engin.), a line to which work is to be
      built or formed.

   {Neat work}, work built or formed to neat lines.

   Syn: Nice; pure; cleanly; tidy; trim; spruce.

Source : WordNet®

neat
     adj 1: clean or orderly; "her neat dress"; "a neat room"
     2: showing care in execution; "neat homework"; "neat
        handwriting"
     3: free from what is tawdry or unbecoming; "a neat style"; "a
        neat set of rules"; "she hated to have her neat plans
        upset" [syn: {refined}, {tasteful}]
     4: free from clumsiness; precisely or deftly executed; "he
        landed a clean left on his opponent's cheek"; "a clean
        throw"; "the neat exactness of the surgeon's knife" [syn:
        {clean}]
     5: very good; "he did a bully job"; "a neat sports car"; "had a
        great time at the party"; "you look simply smashing" [syn:
         {bang-up}, {bully}, {corking}, {cracking}, {dandy}, {great},
         {groovy}, {keen}, {nifty}, {not bad(p)}, {peachy}, {slap-up},
         {swell}, {smashing}]
     6: without water; "took his whiskey neat" [syn: {straight}, {full-strength}]