Definitions
1.nounAnything that assures a certain outcome."Can you give me a guarantee that he will be fit for the match?"
2.nounA legal assurance of something, e.g. a security for the fulfillment of an obligation.
3.nounMore specifically, a written declaration that a certain product will be fit for a purpose and work correctly; a warranty"The cooker comes with a five-year guarantee."
4.nounThe person to whom a guarantee is made.
5.nounA person who gives such a guarantee; a guarantor.
6.verbTo give an assurance that something will be done right.
7.verbTo assume or take responsibility for a debt or other obligation.
8.verbTo make something certain."The long sunny days guarantee a good crop."