/
ˈiːən/
n.
(
US or
technical also
eon)
- an indefinite and very long period.
- Astronomy & Geology a period of a thousand million years.
- Geology a major division of geological time, subdivided into eras.
- Philosophy (in Neoplatonism, Platonism, and Gnosticism) a power existing outside time, deriving from the supreme deity.
Etymology
C17: via eccles. L. from Gk aiōn ‘age’.
