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English definition of “guarantee”

guarantee

verb [T]     /ˌɡærənˈtiː/
to promise that something will happen or is true : guarantee sb sth European Airlines guarantees its customers top-quality service .guarantee that sth is sth We guarantee that our products are 100 % safe .be guaranteed (to be) sth Their bread is guaranteed free of preservatives .
to make something sure to happen or to be true : Good design does not always guarantee success .guarantee that How can we guarantee that no one can access our intranet ?
COMMERCE if a company guarantees a product or service , it gives a written promise to return the customer's money or repair or exchange the product if there is a problem with it within a particular period : guarantee sth for sth We guarantee all our work for six months .
BANKING to offer something valuable to someone with the agreement that they can keep it if you fail to pay a loan or do what you promise : If you guarantee the loan , you will lose the business if you default on payments .
(Definition of guarantee verb from the Cambridge Business English Dictionary © Cambridge University Press)
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