UNIS Views 8 meanings found UNIS commonly stands for the United Nations Information Service, the agency that disseminates UN news worldwide, and it also refers to the United Nations International School, an educational institution serving expatriate families. Miscellaneous Utah Notification Information System Community Union Nationale Inter-Syndicale United Nations Intl School Governmental United Nations Information Service United Nations International School Academic & Science Unmanned Nautical Informational Submersible Regional Sovetsky Rudnik, Russia Business Uniservice Corporation (de-listed)