(US) Eternity. / A period of 1,000,000,000 years. / (geology) The longest geochronologic unit, being a period of hundreds of millions of years; subdivided into eras.

plural of eon

(politics) The Greek National Organisation of Youth, similar to the Hitler Youth. It was formed before WWII and disbanded in 1941.

Initialism of Radio Data System Enhanced Other Networks.

(astronomy, physics) A unit of length equal to the distance light travels in one eon.

plural of light eon

(sexology) The pretence of being the opposite sex, especially that by a man of being a woman; transvestism.

Of or pertaining to an eon / (by extension) everlasting

That lasts for an eon.

(finance) Alternative form of EONIA