(1):

(n.) To make secure; to give assurance against harm; to guarantee safety to; to give authority or power to do, or forbear to do, anything by which the person authorized is secured, or saved harmless, from any loss or damage by his action.

(2):

(n.) To assure, as a thing sold, to the purchaser; that is, to engage that the thing is what it appears, or is represented, to be, which implies a covenant to make good any defect or loss incurred by it.

(3):

(n.) To give a warrant or warranty to; to assure as if by giving a warrant to.

(4):

(n.) To secure to, as a grantee, an estate granted; to assure.

(5):

(n.) That which warrants or authorizes; a commission giving authority, or justifying the doing of anything; an act, instrument, or obligation, by which one person authorizes another to do something which he has not otherwise a right to do; an act or instrument investing one with a right or authority, and thus securing him from loss or damage; commission; authority.

(6):

(n.) A writing which authorizes a person to receive money or other thing.

(7):

(n.) A precept issued by a magistrate authorizing an officer to make an arrest, a seizure, or a search, or do other acts incident to the administration of justice.

(8):

(n.) An official certificate of appointment issued to an officer of lower rank than a commissioned officer. See Warrant officer, below.

(9):

(n.) That which vouches or insures for anything; guaranty; security.

(10):

(n.) That which attests or proves; a voucher.

(11):

(n.) Right; legality; allowance.

(12):

(n.) To secure to, as a purchaser, the quality or quantity of the goods sold, as represented. See Warranty, n., 2.

(13):

(n.) To secure to, as a purchaser of goods, the title to the same; to indemnify against loss.

(14):

(n.) To support by authority or proof; to justify; to maintain; to sanction; as, reason warrants it.