costcost2 verb1 (past tensepst and past participlepp cost) [transitiveT] to have a particular priceThis dress cost $75.
cost (somebody) somethingHow much did the work cost you?
2cost a (small) fortune/the earth (also cost a bomb/packet British EnglishBrE informal) to have a very high priceThe meal cost a small fortune, but it was well worth it.
What a fantastic dress. It must have cost a bomb!
3 (past tensepst and past participlepp costed) [transitiveT usually passive]ACCOUNTING to calculate the cost of something or decide how much something should costWe’ll get the plan costed before sending it to the board.