Eternity

Eternity, in common parlance, is an infinite amount of time that never ends or the quality, condition or fact of being everlasting or eternal.^[1] Classical philosophy, however, defines eternity as what is timeless or exists outside time, whereas sempiternity corresponds to infinite duration.

^ "eternity". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)

[1] "eternity". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)

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