War·rant n.
 1. 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.  Specifically: --
 (a) A writing which authorizes a person to receive money or other thing.
 (b) Law 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.
 (c) Mil. & Nav. An official certificate of appointment issued to an officer of lower rank than a commissioned officer.  See Warrant officer, below.
 2. That which vouches or insures for anything; guaranty; security.
    I give thee warrant of thy place.   --Shak.
    His worth is warrant for his welcome hither.   --Shak.
 3. That which attests or proves; a voucher.
 4. Right; legality; allowance.  [Obs.]
 Bench warrant. Law See in the Vocabulary.
 Dock warrant Com., a customhouse license or authority.
 General warrant. Law See under General.
 Land warrant. See under Land.
 Search warrant. Law See under Search, n.
 Warrant of attorney Law, written authority given by one person to another empowering him to transact business for him; specifically, written authority given by a client to his attorney to appear for him in court, and to suffer judgment to pass against him by confession in favor of some specified person. --Bouvier.
 Warrant officer, a noncommissioned officer, as a sergeant, corporal, bandmaster, etc., in the army, or a quartermaster, gunner, boatswain, etc., in the navy.
 Warrant to sue and defend. (a) O. Eng. Law A special warrant from the crown, authorizing a party to appoint an attorney to sue or defend for him. (b) A special authority given by a party to his attorney to commence a suit, or to appear and defend a suit in his behalf. This warrant is now disused.  --Burrill.


 warrant officer
      n : holds rank by virtue of a warrant