The Collaborative International Dictionary of English v.0.48:

Round \Round\, v. t. [imp. & p. p. Rounded; p. pr. & vb. n.
   Rounding.]
   1. To make circular, spherical, or cylindrical; to give a
      round or convex figure to; as, to round a silver coin; to
      round the edges of anything.
      [1913 Webster]

            Worms with many feet, which round themselves into
            balls, are bred chiefly under logs of timber.
                                                  --Bacon.
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            The figures on our modern medals are raised and
            rounded to a very great perfection.   --Addison.
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   2. To surround; to encircle; to encompass.
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            The inclusive verge
            Of golden metal that must round my brow. --Shak.
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   3. To bring to fullness or completeness; to complete; hence,
      to bring to a fit conclusion.
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            We are such stuff
            As dreams are made on, and our little life
            Is rounded with a sleep.              --Shak.
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   4. To go round wholly or in part; to go about (a corner or
      point); as, to round a corner; to round Cape Horn.
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   5. To make full, smooth, and flowing; as, to round periods in
      writing. --Swift.
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   To round in (Naut.) To haul up; usually, to haul the slack
      of (a rope) through its leading block, or to haul up (a
      tackle which hangs loose) by its fall. --Totten.
      (b) To collect together (cattle) by riding around them, as
          on cattle ranches. [Western U.S.]
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rounded \Round"ed\, a. (Phonetics)
   Modified by contraction of the lip opening; labialized;
   labial. See Guide to Pronunciation, [sect] 11.
   [1913 Webster]

WordNet (r) 3.0 (2006):

rounded
    adj 1: curving and somewhat round in shape rather than jagged;
           "low rounded hills"; "rounded shoulders" [ant: angular,
           angulate]

Moby Thesaurus II by Grady Ward, 1.0:

165 Moby Thesaurus words for "rounded":
   Junoesque, abrupt, accented, alveolar, annular, annulate, annulose,
   apical, apico-alveolar, apico-dental, arched, arciform,
   articulated, assimilated, back, bagging, baggy, ballooning,
   barytone, bellied, bellying, bellylike, bent, bilabial, billowing,
   billowy, bloated, bluff, blunt, blunt-edged, blunt-ended,
   blunt-pointed, blunted, bluntish, bosomy, bowed, broad, built,
   bulbose, bulbous, bulging, bumped, bumpy, bunched, bunchy,
   cacuminal, central, cerebral, checked, circinate, circular, close,
   consonant, consonantal, continuant, convex, coronary, crownlike,
   curvesome, curvilinear, curvy, cyclic, cycloid, dental, discoid,
   disklike, dissimilated, distended, dorsal, dull, dull-edged,
   dull-pointed, dulled, dullish, edgeless, faired, flat, front,
   glide, glossal, glottal, guttural, hard, heavy, high, hillocky,
   hummocky, intonated, labial, labiodental, labiovelar, lateral, lax,
   light, lingual, liquid, low, mid, monophthongal, moutonnee, muted,
   narrow, nasal, nasalized, obtuse, occlusive, open, oxytone,
   palatal, palatalized, pharyngeal, pharyngealized, phonemic,
   phonetic, phonic, pitch, pitched, pneumatic, pointless, posttonic,
   potbellied, pouching, retroflex, ring-shaped, ringlike, rotund,
   round, rounded out, semivowel, smoothed, soft, sonant, stacked,
   stopped, stressed, strong, surd, swelling, syllabic, tense, thick,
   throaty, tonal, tonic, twangy, unaccented, unedged, unpointed,
   unrounded, unsharp, unsharpened, unstressed, velar, verrucated,
   verrucose, vocalic, vocoid, voiced, voiceless, vowel, vowellike,
   warty, weak, well-developed, wide