The Collaborative International Dictionary of English v.0.48:

Mart \Mart\ (m[aum]rt), n. [Contr. fr. market.]
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   1. A market.
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            Where has commerce such a mart . . . as London?
                                                  --Cowper.
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   2. A bargain. [Obs.] --Shak.
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The Collaborative International Dictionary of English v.0.48:

Mart \Mart\, v. t.
   To buy or sell in, or as in, a mart. [Obs.]
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         To sell and mart your officer for gold
         To undeservers.                          --Shak.
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The Collaborative International Dictionary of English v.0.48:

Mart \Mart\, v. t.
   To traffic. [Obs.] --Shak.
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The Collaborative International Dictionary of English v.0.48:

Mart \Mart\, n. [See Mars.]
   1. The god Mars. [Obs.]
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   2. Battle; contest. [Obs.] --Fairfax.
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WordNet (r) 3.0 (2006):

mart
    n 1: an area in a town where a public mercantile establishment
         is set up [syn: marketplace, market place, mart,
         market]