Definition from macmillandictionary.com
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Massive investment is no guarantee of success.
Being with you is my guarantee against them harming me.
Going to court is the best guarantee that you will both be treated fairly.
There’s no guarantee you will get in without a ticket.
I can’t give you any guarantees at the moment.
The company has given a guarantee that there will be no job losses.
The tribes wanted secure guarantees against future invasions.
The university insisted on a written guarantee of good conduct from his uncle.
We need a cast-iron guarantee that the trade in endangered animals will stop.
Many companies offer a 30-day money-back guarantee.
My watch is still under guarantee, so they’ll repair it for free.
Window frames carry a thirty year guarantee against rot or decay.
The bank requires a guarantee for its loans.