Etymology

Noun

1. Security; warrant; guarantee.

   The stamp was a warranty of the public. -John Locke.

2. A covenant real, whereby the granter of an estate of freehold and his heirs were bound to warrant and defend the title, and, in case of eviction by title paramount, to yield other lands of equal value in recompense. This warranty has long since become obsolete, and its place supplied by personal covenants for title. Among these is the covenant of warranty, which runs with the land, and is in the nature of a real covenant.
3. An engagement or undertaking, expressed or implied, that a certain fact regarding the subject of a contract is, or shall be, as it is expressly implied or promised to be. In sales of goods by persons in possession, there is an implied warranty of title.
4. A stipulation or engagement by a party insured, that certain things, relating to the subject of insurance, or affecting the risk, exist, or shall exist, or have been done, or shall be done. These warranties, when expressed, should appear in the policy; but there are certain implied warranties.
5. Justifying mandate or precept; authority; warrant. Shakespeare

   If they disobey precept, that is no excuse to us, nor gives us any warranty . . . to disobey likewise. -Kettlewe.