Meanings
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1
verb
To promise that something will happen or be done.
I can't guarantee that we'll arrive on time.
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2
noun
A firm promise that something will happen or is true.
There is no guarantee that the weather will be good.
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3
noun
A written promise that a product will work or be repaired for free for a set time.
The laptop comes with a two-year guarantee.
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4
verb
To make something certain to happen.
Hard work does not always guarantee success.
Thesaurus
Etymology
From Old French guarantie (perhaps via a later Spanish garante), from the verb guarantir (“to protect, assure, vouch for”), ultimately from Old Frankish *warjand, *warand (“a warrant”), or from guaranty. Doublet of guaranty and warranty.
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