forfeit

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Something surrendered or subject to surrender as punishment for a crime, an offense, an error, or a breach of contract.
2. n. Games Something placed in escrow and then redeemed after payment of a fine.
3. n. Games A game in which forfeits are demanded.
4. n. A forfeiture.
5. adj. Lost or subject to loss through forfeiture.
6. v. To surrender, be deprived of, or give up the right to on account of a crime, an offense, an error, or a breach of contract.
7. v. To subject to seizure as a forfeit.

Century Dictionary and Cyclopedia

1. To lose the legal or moral right to by one's own act or omission to act, usually by a breach of conditions or by a wrong act, offense, fault, crime, or neglect; become by one's own act liable to be deprived of.
2. To cause the forfeiture of.
3. To yield up as a forfeiture.
4. To subject to forfeiture.
5. To transgress; trespass; commit a fault.
6. Forfeited.
7. n. A transgression; a misdeed; a crime; a malicious injury.
8. n. That to which the legal or moral right is lost by one's own act or failure to act, as by a breach of conditions or by a wrong deed or offense; hence, that which is taken or paid in forfeiture; a fine; a mulct; a penalty: as, he who murders pays the forfeit of his life.
9. n. Something deposited and redeemable by a sportive fine; hence, in the plural, a game in which articles deposited by individual players as forfeited by doing or omitting to do something are redeemable by some sportive fine or penalty imposed by the judge.
10. n. Synonyms See list under forfeiture.

Wiktionary

1. n. a penalty for or consequence of a misdemeanor
2. v. To suffer the loss of something by wrongdoing or non-compliance
3. v. To lose a contest, game, match, or other form of competition by voluntary withdrawal, by failing to attend or participate, or by violation of the rules

GNU Webster's 1913

1. n. Obs. & R. Injury; wrong; mischief.
2. n. A thing forfeit or forfeited; what is or may be taken from one in requital of a misdeed committed; that which is lost, or the right to which is alienated, by a crime, offense, neglect of duty, or breach of contract; hence, a fine; a mulct; a penalty.
3. n. Something deposited and redeemable by a sportive fine; -- whence the game of forfeits.
4. adj. Lost or alienated for an offense or crime; liable to penal seizure.
5. v. To lose, or lose the right to, by some error, fault, offense, or crime; to render one's self by misdeed liable to be deprived of; to alienate the right to possess, by some neglect or crime; ; -- with to before the one acquiring what is forfeited.
6. v. obsolete To be guilty of a misdeed; to be criminal; to transgress.
7. v. obsolete To fail to keep an obligation.
8. In the condition of being forfeited; subject to alienation.

WordNet 3.0

1. n. the act of losing or surrendering something as a penalty for a mistake or fault or failure to perform etc.
2. adj. surrendered as a penalty
3. v. lose (s.th.) or lose the right to (s.th.) by some error, offense, or crime
4. n. something that is lost or surrendered as a penalty
5. n. a penalty for a fault or mistake that involves losing or giving up something