verb

 

promise to promise that something is true or will happen

Every child is guaranteed a place at a local school.

 

product If a company guarantees its products, it makes a written promise to repair them or give you a new one if they have a fault.

The repair is guaranteed for 6 months.

 

noun

 

written a written promise made by a company to repair one of its products or give you a new one if it has a fault

a three-year guarantee

 

promise a promise that something will be done or will happen

There's no guarantee that it actually works.