1. Provide adequate grounds to justify (a certain course of action)
   "The emergency does not warrant all of us buying guns"
    
2. Stand behind and guarantee the quality, accuracy, or condition of
   "I warrant this information"; "The dealer warrants all the cars he sells";
   - guarantee

1. (law) a writ from a court commanding police to perform specified acts
   "The police obtained a search warrant before entering the premises"
    
2. (finance) a certificate giving the holder the right to purchase shares at a specified price within a set time period
   "The company issued warrants to early investors";
   - stock warrant, stock-purchase warrant
    
3. Formal and explicit approval
   "The project received a warrant from the ethics committee";
   - sanction, countenance, endorsement, indorsement, imprimatur
    
4. A written assurance that some product or service will be provided or will meet certain specifications
   "The computer came with a one-year warrant";
   - guarantee, warranty

Derived forms: warranted, warrants, warranting

Type of: approval, assurance, back, commendation, endorse, indorse [rare], judicial writ, justify, pledge, plump for, security, support, surety, vindicate, writ

Encyclopedia: Warrant