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.
      [1913 Webster]

            A diamond gone, cost me two thousand ducats. --Shak.
      [1913 Webster]

            Though it cost me ten nights' watchings. --Shak.
      [1913 Webster]

   2. To require to be borne or suffered; to cause.
      [1913 Webster]

            To do him wanton rites, which cost them woe.
                                                  --Milton.
      [1913 Webster]

   To cost dear, to require or occasion a large outlay of
      money, or much labor, self-denial, suffering, etc.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

costing \costing\ n.
   cost accounting. [British]
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

costing
    n 1: cost accounting