Webster's English Dictionary

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cost

1. cost \'ko.st\ n 1a: the amount or equivalent paid or charged for 
   something : PRICE  1b: the outlay or expenditure (as of effort or 
   sacrifice) made to achieve a n object 2: loss or penalty incurred in 
   gaining something  pl  3: expenses incurred in litigation; esp : those 
   given by the law or  the court to the prevailing against the losing party
2. cost vb or cost;  or cost.ing [ME costen, fr. MF coster, fr. L constare 
   to stand firm, to c]ost - more at CONSTANT 1: to require a specified 
   expenditure or payment  2: to require effort, suffering, or loss  1: to 
   have a price of  2: to cause to pay, suffer, or lose  3: to estimate or set 
   the cost of