n.
Function: transitive verb
Etymology: Middle English, waranten to act as protector, guarantee, from Anglo-French warentir, garantir, from warant
Date: 14th century
1 a : to declare or maintain with certainty : be sure that <I'll warrant he'll be here by noon> b : to assure (a person) of the truth of what is said
2 a : to guarantee to a person good title to and undisturbed possession of (as an estate) b : to provide a guarantee of the security of (as title to property sold) usually by an express covenant in the deed of conveyance c : to guarantee to be as represented d : to guarantee (as goods sold) especially in respect of the quality or quantity specified
3 : to guarantee security or immunity to : SECURE <I'll warrant him from drowning ― Shakespeare>
4 : to give warrant or sanction to : AUTHORIZE <the law warrant s this procedure>
5 a : to give proof of the authenticity or truth of b : to give assurance of the nature of or for the undertaking of : GUARANTEE
6 : to serve as or give adequate ground or reason for <promising enough to warrant further consideration>