something that serves to give reliable or formal assurance of something; guarantee, pledge, or security. Synonyms: warranty, surety.
3.
something considered as having the force of a guarantee or as being positive assurance of a thing: The cavalry and artillery were considered sure warrants of success.
4.
a writing or document certifying or authorizing something, as a receipt, license, or commission. Synonyms: permit, voucher, writ, order, chit.
5.
Law. an instrument, issued by a magistrate, authorizing an officer to make an arrest, seize property, make a search, or carry a judgment into execution.
to give reason or sanction for; account for: The circumstances warrant such measures. Synonyms: justify, uphold, support, validate, vindicate.
11.
to give one's word for; vouch for (often used with a clause to emphasize something asserted): I'll warrant he did! Synonyms: guarantee, attest, swear.
12.
to give a formal assurance, or a guarantee or promise, to or for; guarantee: to warrant someone honorable treatment; to warrant payment; to warrant safe delivery.
13.
to guarantee the quantity, quality, and other representations of (an article, product, etc.), as to a purchaser.
Origin: 1175–1225; (noun) Middle English warant < Anglo-French; Old French guarant < Germanic; compare Middle Low German warend, -ent warranty, noun use of present participle of waren to warrant; (v.) Middle English < Anglo-French warantir;Old French g(u)arantir, derivative of guarant;see guaranty
late 13c., "to keep safe from danger," from O.N.Fr. warantir (O.Fr. guarantir), from warant (see warrant (n.)). Meaning "to guarantee to be of quality" is attested from late 14c.; sense of "to guarantee as true" is recorded from c.1300.