Meaning & use
guarantee
A firm promise that something will happen or that a product will meet a certain standard.
See it in a sentence
The manufacturer offers a five-year guarantee on all replacement parts for the washing machine.
There is no guarantee that the flight will leave on time given the storm forecast.
A note on using this word
In everyday use guarantee overlaps with warranty, but warranty usually refers specifically to a written promise about a product's repair or replacement.
Words with a similar meaning
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Another way to use it
2. verb
To promise definitely that something will be done or will happen.
The airline could not guarantee that the connecting flight would wait for delayed passengers.
Make it your own
Write a sentence using “guarantee”, then compare your use with the examples above.