Definition of eightieth
Definition of eightieth from Dictionary.com, the world’s leading online source for English definitions, pronunciations, word origins, idioms, Word of the Day, and more. eightieth [ ey -tee-ith ] / ˈeɪ ti ɪθ / Save This Word! adjective next after the seventy-ninth; being the ordinal number for 80. being one of 80 equal parts. noun an eightieth part, especially of one...