In old conveyancing. To warrant; to bind one’s self, by covenant in a deed of conveyance, to defend the grantee in his title and possession. Warrantizare est defendere et acqui etare tenentem, qui warrantum. vocavit, in seisina sua; et tenens de re warrant! excambium habebit ad valentiam. Co. Litt. 365. To warrant is to defend and insure in peace the tenant, who calls for warranty, in his seisin; and the tenant in warranty will have an exchange in proportion to its value.