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English definition of “guarantee”

guarantee

noun     /ˌɡær.ənˈtiː/
B2 [C or U] a promise that something will be done or will happen, especially a written promise by a company to repair or change a product that develops a fault within a particular period of time: The system costs £99.95 including postage, packing and a twelve-month guarantee. The TV comes with/has a two-year guarantee. a money-back guarantee [+ that] The United Nations has demanded a guarantee from the army that food convoys will not be attacked. [+ (that)] There is no guarantee (that) the discussions will lead to a deal. A product as good as that is a guarantee of commercial success (= it is certain to be successful). The shop said they would replace the television as it was still under guarantee.Official documents [C] a formal agreement to take responsibility for something, such as the payment of someone else's debtMaking and breaking promises and commitments [C] something valuable that you give to someone temporarily while you do what you promised to do for them, and that they will keep if you fail to do itMaking and breaking promises and commitments
(Definition of guarantee noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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