warrant

Noun

• a written assurance that some product or service will be provided or will meet certain specifications

• formal and explicit approval
  • a Democrat usually gets the union's endorsement
    

• a type of security issued by a corporation (usually together with a bond or preferred stock) that gives the holder the right to purchase a certain amount of common stock at a stated price
  • as a sweetener they offered warrants along with the fixed-income securities
    

• a writ from a court commanding police to perform specified acts

Verb

• stand behind and guarantee the quality, accuracy, or condition of
  • The dealer warrants all the cars he sells
    
  • I warrant this information
    

• show to be reasonable or provide adequate ground for
  • The emergency does not warrant all of us buying guns
    
  • The end justifies the means
    

Related words

• Synonyms: 
  guarantee , warrantee , warranty , sanction , countenance , endorsement , indorsement , imprimatur , stock warrant , stock-purchase warrant , justify