[war.ran.ty] n, pl -ties [ME warantie, fr. ONF, fr. warantir to warrant] (14c) 1 a: a real covenant binding the grantor of an estate and his heirs to warrant and defend the title b: a collateral undertaking that a fact regarding the subject of a contract is or will be as it is expressly or by implication declared or promised to be
2: something that authorizes, sanctions, supports, or justifies: warrant
3: a usu. written guarantee of the integrity of a product and of the maker's responsibility for the repair or replacement of defective parts