Anaximenes Syllabification: (An·ax·im·e·nes)Pronunciation: /ˌanakˈsiməˌnēz/Definition of Anaximenes (circa 546 bc), Greek philosopher and scientist from Miletus. He believed the earth to be flat and shallow, a view of astronomy that was a retrograde step from that of Anaximander. Anaximenes in other Oxford dictionaries Definition of Anaximenes in the British & World English dictionary