Learn how to say Aeons correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word aeon:
1 (often aeons) an indefinite and very long period of time:
he reached the crag aeons before I arrived
Astronomy & Geology a unit of time equal to a thousand million years.
Geology a major division of geological time, subdivided into eras:
the Precambrian aeon
2 Philosophy (in Neoplatonism, Platonism, and Gnosticism) a power existing from eternity; an emanation or phase of the supreme deity.
mid 17th century: via ecclesiastical Latin from Greek aiōn ‘age’