The Collaborative International Dictionary of English v.0.48:

Neat \Neat\ (n[=e]t), n. sing. & pl. [AS. ne['a]t; akin to OHG.
   n[=o]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.] (Zool.)
   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.
   [1913 Webster]

         Wherein the herds[men] were keeping of their neat.
                                                  --Spenser.
   [1913 Webster]

         The steer, the heifer, and the calf
         Are all called neat.                     --Shak.
   [1913 Webster]

         A neat and a sheep of his own.           --Tusser.
   [1913 Webster]

   Neat's-foot, an oil obtained by boiling the feet of neat
      cattle. It is used to render leather soft and pliable.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Neat \Neat\, a. [See neat, n.]
   Of or pertaining to the genus Bos, or to cattle of that
   genus; as, neat cattle.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
      [1913 Webster]

            If you were to see her, you would wonder what poor
            body it was that was so surprisingly neat and clean.
                                                  --Law.
      [1913 Webster]

   2. Free from what is unbecoming, inappropriate, or tawdry;
      simple and becoming; pleasing with simplicity; tasteful;
      chaste; as, a neat style; a neat dress.
      [1913 Webster]

   3. Free from admixture or adulteration; good of its kind; as,
      neat brandy; to drink one's vodka neat. Hence: (Chem.)
      Pure; undiluted; as, dissolved in neat acetone. "Our old
      wine neat." --Chapman.
      [1913 Webster +PJC]

   4. Excellent in character, skill, or performance, etc.; nice;
      finished; adroit; as, a neat design; a neat thief.
      [1913 Webster]

   5. With all deductions or allowances made; net.

   Note: [In this sense usually written net. See Net, a.,
         3.]
         [1913 Webster]

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

   Neat work, work built or formed to neat lines.
      [1913 Webster]

   Syn: Nice; pure; cleanly; tidy; trim; spruce.
        [1913 Webster]

WordNet (r) 3.0 (2006):

neat
    adj 1: clean or organized; "her neat dress"; "a neat room" [syn:
           neat, orderly]
    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: neat, 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, neat]
    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, neat, nifty, not bad(p), peachy,
       slap-up, swell, smashing]
    6: without water; "took his whiskey neat" [syn: neat,
       straight, full-strength]

Moby Thesaurus II by Grady Ward, 1.0:

256 Moby Thesaurus words for "neat":
   Attic, Ciceronian, Daedalian, OK, Spartan, absolute, ace-high,
   adept, adroit, all ataunto, anal, apt, artistic, ascetic, ataunt,
   austere, authoritative, bad, bald, bang-up, bare, bonzer, boss,
   bravura, braw, brilliant, bully, bungup and bilge-free, but good,
   calligraphic, candid, capital, chaste, chic, chipper, clarified,
   classic, classy, clean, clean-cut, clear, clever,
   clothes-conscious, comely, common, commonplace, cool, coordinated,
   copperplate, corking, cosmopolitan, crack, crackerjack, cunning,
   cute, daedal, dandy, dapper, dashing, deft, delicious, dexterous,
   dextrous, dinky, diplomatic, direct, distilled,
   dressed to advantage, dressed to kill, dry, ducky, dull, easy,
   efficient, elegant, excellent, exceptional, expert, exquisite, fab,
   fancy, fastidious, fine, fine and dandy, finished, first-class,
   frank, gear, genteel, good, goodish, graceful, gracile, grand,
   great, groovy, handy, heavy, homely, homespun, hot, hunky-dory,
   ingenious, jam-up, jaunty, just dandy, keen, lean, limpid, lucid,
   magisterial, marvy, masterful, masterly, matter-of-fact, mean,
   naked, natty, natural, nifty, no mean, nobby, okay, on the rocks,
   open, orderly, organized, out of sight, peachy, peachy-keen,
   pellucid, perspicuous, plain, plain-speaking, plain-spoken,
   polished, politic, posh, precise, prim, professional, proficient,
   prosaic, prosing, prosy, pure, purified, quick, quite some, ready,
   recherche, rectified, refined, regular, resourceful, restrained,
   ripping, ritzy, round, rum, rustic, scrumptious, severe, shapely,
   sharp, sheer, shipshape, simple, simple-speaking, skillful,
   slap-up, sleek, slick, smart, smashing, smug, snazzy, snug, sober,
   soigne, soignee, solid, some, something else, sophisticated, spare,
   spick and span, spiffing, spiffy, splendid, spruce, stark,
   statesmanlike, straight, straightforward, stunning,
   style-conscious, stylish, super, swank, swanky, swell, systematic,
   tactful, tasteful, taut, terse, the compleat, the complete, tidy,
   tight, top-hole, top-notch, topping, tough, tricksy, trig, trim,
   unadorned, unadulterated, unaffected, unalloyed, unblended,
   uncluttered, uncombined, uncomplicated, uncompounded, uncorrupted,
   uncut, undiluted, unembellished, unfortified, unimaginative,
   unlabored, unleavened, unmingled, unmixed, unornamented,
   unpoetical, unsophisticated, untinged, unvarnished, virtuoso,
   well-cared-for, well-done, well-dressed, well-favored, well-formed,
   well-groomed, well-made, well-ordered, well-proportioned,
   well-shaped, wizard, wonderful, workmanlike



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

NEAT
       New Enhanced Advanced Technology (AT)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

NEAT
       Novell Easy Administration Tool (Novell, Netware)


Bouvier's Law Dictionary, Revised 6th Ed (1856):

NEAT or NET, contracts. The exact weight of an article, without the bag,
box, keg, or other thing in which it may be enveloped.