| Date: | 1600-1700 |
| Origin: | Probably from guaranty |
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guarantee2 S2 [countable]
1 a formal written promise to repair or replace a product if it breaks within a specific period of time [= warranty]:
They offer a two-year guarantee on all their electrical goods.
They offer a two-year guarantee on all their electrical goods.2 a formal promise that something will be done
3
a) a promise that you will pay back money that someone else has used or borrowed, if they do not pay it themselves
b) something valuable that you give to someone to keep until you have done something you promised to do :
The bank is holding the airline's assets as guarantees.
The bank is holding the airline's assets as guarantees.