The Collaborative International Dictionary of English v.0.48:

Belt \Belt\ (b[e^]lt), n. [AS. belt; akin to Icel. belti, Sw.
   b[aum]lte, Dan. b[ae]lte, OHG. balz, L. balteus, Ir. & Gael.
   balt border, belt.]
   1. That which engirdles a person or thing; a band or girdle;
      as, a lady's belt; a sword belt.
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            The shining belt with gold inlaid.    --Dryden.
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   2. That which restrains or confines as a girdle.
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            He cannot buckle his distempered cause
            Within the belt of rule.              --Shak.
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   3. Anything that resembles a belt, or that encircles or
      crosses like a belt; a strip or stripe; as, a belt of
      trees; a belt of sand.
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   4. (Arch.) Same as Band, n., 2. A very broad band is more
      properly termed a belt.
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   5. (Astron.) One of certain girdles or zones on the surface
      of the planets Jupiter and Saturn, supposed to be of the
      nature of clouds.
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   6. (Geog.) A narrow passage or strait; as, the Great Belt and
      the Lesser Belt, leading to the Baltic Sea.
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   7. (Her.) A token or badge of knightly rank.
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   8. (Mech.) A band of leather, or other flexible substance,
      passing around two wheels, and communicating motion from
      one to the other.

   Note: [See Illust. of Pulley.]
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   9. (Nat. Hist.) A band or stripe, as of color, round any
      organ; or any circular ridge or series of ridges.
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   Belt lacing, thongs used for lacing together the ends of
      machine belting.
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The Collaborative International Dictionary of English v.0.48:

Belt \Belt\, v. t. [imp. & p. p. Belted; p. pr. & vb. n.
   Belting.]
   To encircle with, or as with, a belt; to encompass; to
   surround.
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         A coarse black robe belted round the waist. --C. Reade.
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         They belt him round with hearts undaunted.
                                                  --Wordsworth.
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   2. To shear, as the buttocks and tails of sheep. [Prov. Eng.]
      --Halliwell.
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WordNet (r) 3.0 (2006):

belt
    n 1: endless loop of flexible material between two rotating
         shafts or pulleys
    2: a band to tie or buckle around the body (usually at the
       waist)
    3: an elongated region where a specific condition or
       characteristic is found; "a belt of high pressure"
    4: a vigorous blow; "the sudden knock floored him"; "he took a
       bash right in his face"; "he got a bang on the head" [syn:
       knock, bash, bang, smash, belt]
    5: a path or strip (as cut by one course of mowing) [syn:
       swath, belt]
    6: ammunition (usually of small caliber) loaded in flexible
       linked strips for use in a machine gun [syn: belt, belt
       ammunition, belted ammunition]
    7: the act of hitting vigorously; "he gave the table a whack"
       [syn: knock, belt, rap, whack, whang]
    v 1: sing loudly and forcefully [syn: belt out, belt]
    2: deliver a blow to; "He belted his opponent"
    3: fasten with a belt; "belt your trousers" [ant: unbelt]