Definitions
1.nounAuthorization or certification; a sanction, as given by a superior.
2.nounSomething that provides assurance or confirmation; a guarantee or proof."a warrant of authenticity; a warrant for success"
3.nounAn order that serves as authorization; especially a voucher authorizing payment or receipt of money.
4.nounAn option, usually issued together with another security and with a term at issue greater than a year, to buy other securities of the issuer.
5.nounA judicial writ authorizing an officer to make a search, seizure, or arrest, or to execute a judgment."an arrest warrant issued by the court"
6.nounShort for warrant officer.
7.nounA document certifying that a motor vehicle meets certain standards of mechanical soundness and safety; a warrant of fitness.
8.nounA defender, a protector.
9.nounUnderclay in a coal mine.
10.verbTo protect, keep safe (from danger).
11.verbTo give (someone) an assurance or guarantee (of something); also, with a double object: to guarantee (someone something).
12.verbTo guarantee (something) to be (of a specified quality, value, etc.).
13.verbTo guarantee as being true; (colloquially) to believe strongly."That tree is going to fall, I’ll warrant."
14.verbTo authorize; to give (someone) sanction or warrant (to do something)."I am warranted to search these premises fully."
15.verbTo justify; to give grounds for."Circumstances arose that warranted the use of lethal force."