› to reduce the value or amount of something: Concern over the economic crisis continues to hammer the country's stock market and currency, with both falling by 6%.be/get hammered (by sth) Public transport users will be hammered by a 15 percent reduction in service set to go into effect June 17.
hammer the market › to sell a large number of shares in the belief that prices are higher than they should be
hammer sth home › to make certain that something is understood by expressing it clearly and forcefully: The severity of the slump in the housing market has been hammered home by figures released recently by the banks.hammer home a message/point It is hoped that the latest advertising campaign will hammer home the message about the dangers of alcohol.