What is Cost ?
Cost is (noun) 1. a price which you have to pay for something What is the cost of a return ticket to London? Computer costs are falling each year. at all costs at no matter what price At all costs, we have to be in Trafalgar Square by 12 o’clock. 2. to pay costs to pay the expenses of a court case He lost his case and was ordered to pay costs. the judge awarded costs to the defendant the judge said that the defendant would not have to pay the costs of the case(verb) to have a price Potatoes cost 20p a kilo. Petrol seems to cost more all the time. what does it cost? how much is it? to cost the earth to be very expensive Caviar costs the earth. to cost an arm and a leg to be very expensive Don’t buy your kitchen there – it’ll cost you an arm and a leg. The repairs to his car cost him an arm and a leg. fortune, small
source: Easier English, Student Dictionary Upper Intermediate Level