›LAWto lose the right to have or do something because you have not obeyed a rule or law: Over several years, the district forfeited $51 million by failing to spend the money within the deadlines set by the government.forfeit a claim/right (to sth/to do sth) She forfeited her right to benefits because she did not notify the authorities of her change in circumstances.forfeit sth to sb/sthIllegally shipped cigarettes will be seized and forfeited to the state.
›to agree to give away the right to have or do something: A culture of long hours and time forfeited in favour of money is now becoming routine.