warrant

a writ from a court commanding police to perform specified acts

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"

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

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

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

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