- guarantee
- 1
verb (T)
1 PROMISE STH WILL HAPPEN to promise that something will certainly happen or be done: guarantee (that): Take this opportunity, and I guarantee you won't regret it. | guarantee sth: The authorities could not guarantee the safety of the UN observers. | guarantee sb sth: Even if you complete your training I can't guarantee you a job.2 A PRODUCT to make a formal written promise to repair or replace a product if it has a fault within a specific period of time after you buy it: guarantee sth against: a toaster guaranteed for one year against failure of parts3 LEGAL to make yourself legally responsible for the payment of money4 MAKE STH CERTAIN to make it certain that something will happen: She soon learned that marriage does not guarantee happiness.5 CERTAIN TO DO STH be guaranteed to do sth to be certain to behave, work, or happen in a particular way: If you yell at him, he's guaranteed to do the opposite of what you want.6 PROTECT guarantee sth against AmE to provide complete protection against harm or damage: Rustshield guarantees your car against corrosion.2 noun (C)1 a formal written promise to repair or replace a product without charging, if it has a fault within a specific time after you buy it: The television comes with a two-year guarantee. | be under guarantee (=be protected by a guarantee): Your watch will be repaired free if it's still under guarantee.2 a formal and firm promise that something will be done or will happen(+ of): Is there a guarantee of work after training? | give sb a guarantee (that): Can you give me a guarantee that the work will be finished on time? 3a) an agreement to be responsible for someone else's promise, especially a promise to pay a debtb) something valuable given to someone to keep until the owner has kept their a promise, especially to pay a debt—compare security (4), warranty
Longman dictionary of contemporary English. 2004.