[, ]an amount of money that is paid to sb to make sure they are available to do work when they are needed（聘请律师等的）预付费用，保留金◆He received a monthly retainer of $6 000.他收到了每月 6 000 元的聘用金。◆The company has a labour lawyer on retainer.这家公司雇用了一位劳工律师。➡retain (3)