Alcaeus Syllabification: (Al·cae·us)Pronunciation: /alˈsēəs/Definition of Alcaeus (circa 620-circa 580 bc), Greek lyric poet. He invented a new form of lyric meter called the alcaic. His works were a model for the Roman poet Horace and the verse of the Renaissance. Alcaeus in other Oxford dictionaries Definition of Alcaeus in the British & World English dictionary