Marcus Tullius Cicero mar·cus·tul·liuscicero uncommon noun 1. a Roman statesman and orator remembered for his mastery of Latin prose (106-43 BC) SynonymsCiceroMarcus Tullius CiceroTully Related words Broader terms oratorstatesman WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.