eon noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced American Dictionary at OxfordLearnersDictionaries.com

Definition of eon noun from the Oxford Advanced American Dictionary

eon

noun

NAmE//ˈiən//

, NAmE//ˈiɑn//

1an extremely long period of time; thousands of years Only yesterday—and it seemed eons ago, not just a few hours—he had been a happily married man.

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2(geology) a major division of time, divided into eras eons of geological history

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