имя существительное 1) бесконечность, вечность Синоним(ы): eternity 2) [геология] эра
or eon noun Etymology: Latin, from Greek aiōn — more at aye 1. an immeasurably or indefinitely long period of time; age 2. a. (usually eon) a very large division of geologic time usually longer than an era b. a unit of geologic time equal to one billion years