guarantor Syllabification: (guar·an·tor)Pronunciation: /ˌgarənˈtôr, ˈgarəntər/Translate guarantor | into German | into Italian | into Spanish Definition of guarantor noun a person, organization, or thing that guarantees something:the role of the police as guarantors of public order Law a person or organization who provides a guaranty. guarantor in other Oxford dictionaries Definition of guarantor in the British & World English dictionary