The Collaborative International Dictionary of English v.0.48:

Tidy \Ti"dy\, v. i.
   To make things tidy. [Colloq.]
   [1913 Webster]

         I have tidied and tidied over and over again.
                                                  --Dickens.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tidy \Ti"dy\, n. (Zool.)
   The wren; -- called also tiddy. [Prov. Eng.]
   [1913 Webster]

         The tidy for her notes as delicate as they. --Drayton.
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   Note: This name is probably applied also to other small
         singing birds, as the goldcrest.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tidy \Ti"dy\, a. [Compar. Tidier; superl. Tidiest.] [From
   Tide time, season; cf. D. tijdig timely, G. zeitig, Dan. &
   Sw. tidig.]
   1. Being in proper time; timely; seasonable; favorable; as,
      tidy weather. [Obs.]
      [1913 Webster]

            If weather be fair and tidy.          --Tusser.
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   2. Arranged in good order; orderly; appropriate; neat; kept
      in proper and becoming neatness, or habitually keeping
      things so; as, a tidy lass; their dress is tidy; the
      apartments are well furnished and tidy.
      [1913 Webster]

            A tidy man, that tened [injured] me never. --Piers
                                                  Plowman.
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The Collaborative International Dictionary of English v.0.48:

Tidy \Ti"dy\, n.; pl. Tidies.
   1. A cover, often of tatting, drawn work, or other ornamental
      work, for the back of a chair, the arms of a sofa, or the
      like.
      [1913 Webster]

   2. A child's pinafore. [Prov. Eng.] --Wright.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tidy \Ti"dy\, v. t. [imp. & p. p. Tidied; p. pr. & vb. n.
   Tidying.]
   To put in proper order; to make neat; as, to tidy a room; to
   tidy one's dress.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tidy
    adj 1: marked by order and cleanliness in appearance or habits;
           "a tidy person"; "a tidy house"; "a tidy mind" [ant:
           untidy]
    2: (of hair) neat and tidy; "a nicely kempt beard" [syn:
       kempt, tidy]
    3: large in amount or extent or degree; "it cost a considerable
       amount"; "a goodly amount"; "received a hefty bonus"; "a
       respectable sum"; "a tidy sum of money"; "a sizable fortune"
       [syn: goodly, goodish, healthy, hefty, respectable,
       sizable, sizeable, tidy]
    n 1: receptacle that holds odds and ends (as sewing materials)
    v 1: put (things or places) in order; "Tidy up your room!" [syn:
         tidy, tidy up, clean up, neaten, straighten,
         straighten out, square away]

Moby Thesaurus II by Grady Ward, 1.0:

126 Moby Thesaurus words for "tidy":
   OK, acceptable, adequate, admissible, all right, ample, anal,
   arrange, better than nothing, big, bleach, bowdlerize, bowdlerized,
   bumper, chipper, clean, clean out, clean up, cleaned, cleaned up,
   cleanse, cleansed, clear out, clear the decks, clear up,
   considerable, decent, delouse, depurate, deterge, dinky, dry-clean,
   dust, dust off, expurgate, expurgated, fair, fairish, fix up,
   freshen, generous, good, good enough, goodish, goodly, grand,
   great, groom, healthy, large, large-scale, lustrate, man-sized,
   methodical, moderate, neat, neaten, not amiss, not bad,
   not half bad, not so bad, numerous, okay, orderly, organize,
   organized, passable, police, police up, presentable, pretty good,
   purge, purged, purified, purify, put in order, put in trim,
   rearrange, refined, reform, reformed, reorganize, respectable,
   satisfactory, scavenge, shipshape, significant, sizable, sizeable,
   sleek, slick, smart, snug, spick and span, spick-and-span, spruce,
   spruce up, steam-clean, straighten out, straighten up, substantial,
   sufficient, sweep out, sweeten, systematic, tall, tidy up, tight,
   tolerable, trig, trig up, trim, trim up, uncluttered,
   unexceptionable, unobjectionable, well-cared-for, well-groomed,
   well-kept, well-ordered, whiten, wipe, wipe off, wipe out, wipe up,
   workmanlike