war·ran·ty 
(wôrən-tē, wŏr-)
(wôrən-tē, wŏr-)n. pl. war·ran·ties
1. A representation, especially in writing, made by a seller or company to a purchaser of a product or service that a refund, repair, or replacement will be made if the product or service proves defective or unsatisfactory, especially within a given time period.
2. Law
a. An assurance by the seller of property that the goods or property are as represented or will be as promised.
b. The insured's guarantee that the facts are as stated in reference to an insurance risk or that specified conditions will be fulfilled to keep the contract effective.
c. A covenant by which the seller of land binds himself or herself and his or her heirs to defend the security of the estate conveyed.
d. A judicial writ; a warrant.
3. Justification or valid grounds for an act or a course of action: "That he has imitated at all ... is sufficient warranty for placing him among the men of talent rather than among the men of genius" (Edgar Allan Poe).
tr.v. war·ran·tied, war·ran·ty·ing, war·ran·ties
To provide a warranty for.
[Middle English warantie, from Old North French, from feminine past participle of warantir, to guarantee, from warant, warrant; see wer-4 in the Appendix of Indo-European roots.]