The Collaborative International Dictionary of English v.0.48:

Graze \Graze\, n.
   1. The act of grazing; the cropping of grass. [Colloq.]
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            Turning him out for a graze on the common. --T.
                                                  Hughes.
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   2. A light touch; a slight scratch.
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The Collaborative International Dictionary of English v.0.48:

Graze \Graze\ (gr[=a]z), v. t. [imp. & p. p. Grazed
   (gr[=a]zd); p. pr. & vb. n. Grazing.] [OE. grasen, AS.
   grasian, fr. gr[ae]s grass. See Grass.]
   1. To feed or supply (cattle, sheep, etc.) with grass; to
      furnish pasture for.
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            A field or two to graze his cows.     --Swift.
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   2. To feed on; to eat (growing herbage); to eat grass from (a
      pasture); to browse.
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            The lambs with wolves shall graze the verdant mead.
                                                  --Pope.
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   3. To tend (cattle, etc.) while grazing.
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            When Jacob grazed his uncle Laban's sheep. --Shak.
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   4. To rub or touch lightly the surface of (a thing) in
      passing; as, the bullet grazed the wall.
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The Collaborative International Dictionary of English v.0.48:

Graze \Graze\, v. i.
   1. To eat grass; to feed on growing herbage; as, cattle graze
      on the meadows.
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   2. To yield grass for grazing.
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            The ground continueth the wet, whereby it will never
            graze to purpose. --Bacon.
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   3. To touch something lightly in passing.
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WordNet (r) 3.0 (2006):

graze
    n 1: a superficial abrasion
    2: the act of grazing [syn: graze, grazing]
    v 1: feed as in a meadow or pasture; "the herd was grazing"
         [syn: crop, browse, graze, range, pasture]
    2: break the skin (of a body part) by scraping; "She was grazed
       by the stray bullet"
    3: let feed in a field or pasture or meadow [syn: crop,
       graze, pasture]
    4: scrape gently; "graze the skin" [syn: graze, crease,
       rake]
    5: eat lightly, try different dishes; "There was so much food at
       the party that we quickly got sated just by browsing" [syn:
       browse, graze]