The Collaborative International Dictionary of English v.0.48:

Deal \Deal\, v. t. [imp. & p. p. Dealt (d[e^]lt); p. pr. & vb.
   n. Dealing.] [OE. delen, AS. d[=ae]lan, fr. d[=ae]l share;
   akin to OS. d[=e]lian, D. deelen, G. theilen, teilen, Icel.
   deila, Sw. dela, Dan. dele, Goth. dailjan. See Deal, n.]
   1. To divide; to separate in portions; hence, to give in
      portions; to distribute; to bestow successively; --
      sometimes with out.
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            Is it not to deal thy bread to the hungry? --Is.
                                                  lviii. 7.
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            And Rome deals out her blessings and her gold.
                                                  --Tickell.
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            The nightly mallet deals resounding blows. --Gay.
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            Hissing through the skies, the feathery deaths were
            dealt.                                --Dryden.
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   2. Specifically: To distribute, as cards, to the players at
      the commencement of a game; as, to deal the cards; to deal
      one a jack.
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The Collaborative International Dictionary of English v.0.48:

Dealing \Deal"ing\, n.
   The act of one who deals; distribution of anything, as of
   cards to the players; method of business; traffic;
   intercourse; transaction; as, to have dealings with a person.
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   Double dealing, insincere, treacherous dealing; duplicity.


   Plain dealing, fair, sincere, honorable dealing; honest,
      outspoken expression of opinion.
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WordNet (r) 3.0 (2006):

dealing
    n 1: method or manner of conduct in relation to others; "honest
         dealing"
    2: the act of transacting within or between groups (as carrying
       on commercial activities); "no transactions are possible
       without him"; "he has always been honest is his dealings with
       me" [syn: transaction, dealing, dealings]

Moby Thesaurus II by Grady Ward, 1.0:

72 Moby Thesaurus words for "dealing":
   ESP, agency, answer, balance of trade, barter, bartering,
   big business, brokerage, business, business dealings,
   buying and selling, commerce, commercial affairs,
   commercial relations, communication, communion, congress,
   connection, contact, conversation, converse, correspondence,
   dealings, doing business, exchange, fair trade, free trade,
   give-and-take, horse trading, industry, information, interaction,
   interchange, intercommunication, intercommunion, intercourse,
   interplay, jobbing, linguistic intercourse, market, marketing,
   mercantile business, merchandising, merchantry, message,
   multilateral trade, reciprocal trade, reply, response,
   restraint of trade, retailing, small business, social intercourse,
   speaking, speech, speech circuit, speech situation, swapping,
   talking, telepathy, the business world, the marketplace, touch,
   trade, trading, traffic, trafficking, truck, two-way communication,
   unilateral trade, wheeling and dealing, wholesaling