The Collaborative International Dictionary of English v.0.48:

Supply \Sup*ply"\, n.; pl. Supplies.
   1. The act of supplying; supplial. --A. Tucker.
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   2. That which supplies a want; sufficiency of things for use
      or want. Specifically:
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      (a) Auxiliary troops or reenforcements. "My promised
          supply of horsemen." --Shak.
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      (b) The food, and the like, which meets the daily
          necessities of an army or other large body of men;
          store; -- used chiefly in the plural; as, the army was
          discontented for lack of supplies.
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      (c) An amount of money provided, as by Parliament or
          Congress, to meet the annual national expenditures;
          generally in the plural; as, to vote supplies.
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      (d) A person who fills a place for a time; one who
          supplies the place of another; a substitute; esp., a
          clergyman who supplies a vacant pulpit.
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   Stated supply (Eccl.), a clergyman employed to supply a
      pulpit for a definite time, but not settled as a pastor.
      [U.S.]

   Supply and demand. (Polit. Econ.) "Demand means the
      quantity of a given article which would be taken at a
      given price. Supply means the quantity of that article
      which could be had at that price." --F. A. Walker.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Supply \Sup*ply"\, v. t. [imp. & p. p. Supplied; p. pr. & vb.
   n. Supplying.] [For older supploy, F. suppl['e]er, OF. also
   supployer, (assumed) LL. suppletare, from L. supplere,
   suppletum; sub under + plere to fill, akin to plenus full.
   See Plenty.]
   1. To fill up, or keep full; to furnish with what is wanted;
      to afford, or furnish with, a sufficiency; as, rivers are
      supplied by smaller streams; an aqueduct supplies an
      artificial lake; -- often followed by with before the
      thing furnished; as, to supply a furnace with fuel; to
      supply soldiers with ammunition.
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   2. To serve instead of; to take the place of.
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            Burning ships the banished sun supply. --Waller.
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            The sun was set, and Vesper, to supply
            His absent beams, had lighted up the sky. --Dryden.
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   3. To fill temporarily; to serve as substitute for another
      in, as a vacant place or office; to occupy; to have
      possession of; as, to supply a pulpit.
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   4. To give; to bring or furnish; to provide; as, to supply
      money for the war. --Prior.
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   Syn: To furnish; provide; administer; minister; contribute;
        yield; accommodate.
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The Collaborative International Dictionary of English v.0.48:

Supply \Sup*ply"\, a.
   Serving to contain, deliver, or regulate a supply of
   anything; as, a supply tank or valve.
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   Supply system (Zool.), the system of tubes and canals in
      sponges by means of which food and water are absorbed. See
      Illust. of Spongiae.
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WordNet (r) 3.0 (2006):

supply
    n 1: an amount of something available for use
    2: offering goods and services for sale [ant: demand]
    3: the activity of supplying or providing something [syn:
       provision, supply, supplying]
    v 1: give something useful or necessary to; "We provided the
         room with an electrical heater" [syn: supply, provide,
         render, furnish]
    2: circulate or distribute or equip with; "issue a new uniform
       to the children"; "supply blankets for the beds" [syn:
       issue, supply] [ant: recall]
    3: give what is desired or needed, especially support, food or
       sustenance; "The hostess provided lunch for all the guests"
       [syn: provide, supply, ply, cater]
    4: state or say further; "`It doesn't matter,' he supplied"
       [syn: add, append, supply]

Moby Thesaurus II by Grady Ward, 1.0:

134 Moby Thesaurus words for "supply":
   ability, accommodate, accommodate with, accouterment, accumulation,
   acting, ad interim, afford, armament, assets, available means,
   balance, cache, capacity, capital, capital goods, capitalization,
   cater to, catering, chandlery, clothe, come up with, contribute,
   deliver, delivery, devices, dispense, disposable resources,
   distribute, distribution, donate, endow, endowment, equip,
   equipment, favor with, feed, fill, fill up, find, finding, fit out,
   fitting out, fulfill, fund, funds, furnish, furnishing,
   furnishment, give, grist, hand, hand over, heap upon, hoard,
   holdings, indulge with, interim, inventory, invest, investment,
   keep, lavish upon, liquid assets, logistics, maintain,
   make available, make provision for, material resources, materials,
   materiel, means, method, outfit, outfitting, pour on, power,
   preparation, prepare, present, pro tem, pro tempore, procurement,
   property, provide, provide for, providing, provision, provisioning,
   purvey, purveyance, quantity, raw material, recourses, recruit,
   reinforcement, replenish, replenishment, reserve, reservoir,
   resorts, resource, resources, resupply, retailing, rig out,
   satisfy, sell, selling, shower down upon, staple, stock, stocking,
   stockpile, stockpiling, store, stuff, subsidization, subsidize,
   subsidy, substances, subvention, supplying, support, surplus,
   transfer, turn over, victual, victualing, ways, ways and means,
   wherewith, wherewithal, yield