The Collaborative International Dictionary of English v.0.48:

Cost \Cost\, n. [OF. cost, F. co[^u]t. See Cost, v. t. ]
   1. The amount paid, charged, or engaged to be paid, for
      anything bought or taken in barter; charge; expense;
      hence, whatever, as labor, self-denial, suffering, etc.,
      is requisite to secure benefit.
      [1913 Webster]

            One day shall crown the alliance on 't so please
            you,
            Here at my house, and at my proper cost. --Shak.
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            At less cost of life than is often expended in a
            skirmish, [Charles V.] saved Europe from invasion.
                                                  --Prescott.
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   2. Loss of any kind; detriment; pain; suffering.
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            I know thy trains,
            Though dearly to my cost, thy gins and toils.
                                                  --Milton.
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   3. pl. (Law) Expenses incurred in litigation.
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   Note: Costs in actions or suits are either between attorney
         and client, being what are payable in every case to the
         attorney or counsel by his client whether he ultimately
         succeed or not, or between party and party, being those
         which the law gives, or the court in its discretion
         decrees, to the prevailing, against the losing, party.
         [1913 Webster]

   Bill of costs. See under Bill.

   Cost free, without outlay or expense. "Her duties being to
      talk French, and her privileges to live cost free and to
      gather scraps of knowledge." --Thackeray.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cost \Cost\ (k[o^]st; 115), n. [L. costa rib. See Coast.]
   1. A rib; a side; a region or coast. [Obs.] --Piers Plowman.
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            Betwixt the costs of a ship.          --B. Jonson.
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   2. (Her.) See Cottise.
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The Collaborative International Dictionary of English v.0.48:

Cost \Cost\ (k[o^]st; 115), v. t. [imp. & p. p. Cost; p. pr. &
   vb. n. Costing.] [OF. coster, couster, F. co[^u]ter, fr. L.
   constare to stand at, to cost; con- + stare to stand. See
   Stand, and cf. Constant.]
   1. To require to be given, expended, or laid out therefor, as
      in barter, purchase, acquisition, etc.; to cause the cost,
      expenditure, relinquishment, or loss of; as, the ticket
      cost a dollar; the effort cost his life.
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            A diamond gone, cost me two thousand ducats. --Shak.
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            Though it cost me ten nights' watchings. --Shak.
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   2. To require to be borne or suffered; to cause.
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            To do him wanton rites, which cost them woe.
                                                  --Milton.
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   To cost dear, to require or occasion a large outlay of
      money, or much labor, self-denial, suffering, etc.
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The Collaborative International Dictionary of English v.0.48:

Cottise \Cot"tise\ (k[o^]t"t[i^]s), n. [Cf. F. c[^o]t['e] side,
   L. costa rib.] (Her.)
   A diminutive of the bendlet, containing one half its area or
   one quarter the area of the bend. When a single cottise is
   used alone it is often called a cost. See also
   Couple-close.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cost
    n 1: the total spent for goods or services including money and
         time and labor
    2: the property of having material worth (often indicated by the
       amount of money something would bring if sold); "the
       fluctuating monetary value of gold and silver"; "he puts a
       high price on his services"; "he couldn't calculate the cost
       of the collection" [syn: monetary value, price, cost]
    3: value measured by what must be given or done or undergone to
       obtain something; "the cost in human life was enormous"; "the
       price of success is hard work"; "what price glory?" [syn:
       price, cost, toll]
    v 1: be priced at; "These shoes cost $100" [syn: cost, be]
    2: require to lose, suffer, or sacrifice; "This mistake cost him
       his job"

Moby Thesaurus II by Grady Ward, 1.0:

101 Moby Thesaurus words for "cost":
   afford, amount, amount to, bereavement, bring, bring in, budget,
   budget items, burden of expenditure, carrying charge, charge,
   charges, come to, come up to, cost of living, cost out,
   cost-of-living allowance, cost-of-living index, costs, damage,
   dead loss, debit, denial, denudation, deprivation, despoilment,
   destruction, detriment, direct costs, disbursals, disburse,
   dispossession, distributed costs, divestment, expend, expenditure,
   expense, expense account, expenses, fetch, figure, forfeit,
   forfeiture, fork out, general expenses, get, go through,
   incur costs, indirect costs, injury, invest, labor costs, lay out,
   liabilities, loser, losing, losing streak, loss, material costs,
   mount up to, open the purse, operating costs, operating expense,
   outlay, overhead, pay, pay out, payment, perdition, price,
   price tag, prime cost, privation, put out, rate, replacement cost,
   robbery, ruin, run into, run through, run to, sacrifice, schedule,
   score, sell for, set one back, shell out, sink money in, spend,
   splurge, spoliation, squander, stripping, swindle sheet, tab,
   taking away, tariff, throw money around, total loss, total up to,
   unit cost



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

COST
       COpenhagen SGML Tool (SGML), "CoST"