The Collaborative International Dictionary of English v.0.48:

Garnish \Gar"nish\, n.
   1. Something added for embellishment; decoration; ornament;
      also, dress; garments, especially such as are showy or
      decorated.
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            So are you, sweet,
            Even in the lovely garnish of a boy.  --Shak.
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            Matter and figure they produce;
            For garnish this, and that for use.   --Prior.
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   2. (Cookery) Something set round or upon a dish as an
      embellishment, such as parsley. See Garnish, v. t., 2.
      --Smart.
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   3. Fetters. [Cant]
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   4. A fee; specifically, in English jails, formerly an
      unauthorized fee demanded by the old prisoners of a
      newcomer. [Cant] --Fielding.
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   Garnish bolt (Carp.), a bolt with a chamfered or faceted
      head. --Knight.
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