Eon vs. Eternity

Eonnoun

(US) Eternity.

Eternitynoun

(uncountable) Existence without end, infinite time.

Eonnoun

A period of 1,000,000,000 years.

Eternitynoun

Existence outside of time.

Eonnoun

(geology) The longest time period used in geology.

Eternitynoun

(countable) A period of time which extends infinitely far into the future.

Eonnoun

A long period of time.

‘It's been eons since we last saw each other.’;

Eternitynoun

(metaphysical) The remainder of time that elapses after death.

Eonnoun

A spirit being emanating from the Godhead.

Eternitynoun

A comparatively long time.

‘It's been an eternity since we last saw each other.’;

Eonnoun

An immeasurable or infinite space of time; eternity; a long space of time; an age.

‘The eons of geological time.’;

Eternitynoun

Infinite duration, without beginning in the past or end in the future; also, duration without end in the future; endless time.

‘The high and lofty One, that inhabiteth eternity.’;

Eonnoun

One of the embodiments of the divine attributes of the Eternal Being.

‘Among the higher Æons are Mind, Reason, Power, Truth, and Life.’;

Eternitynoun

Condition which begins at death; immortality.

‘Thou know'st 't is common; all that lives must die,Passing through nature to eternity.’;

Eonnoun

the longest division of geological time

Eternitynoun

time without end

Eonnoun

an immeasurably long period of time

Eternitynoun

a state of eternal existence believed in some religions to characterize the afterlife

Eonnoun

(Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe

Eternitynoun

a seemingly endless time interval (waiting)

Eternitynoun

infinite or unending time

‘this state of affairs has lasted for all eternity’; ‘their love was sealed for eternity’;

Eternitynoun

a state to which time has no application; timelessness

‘the encounter between time and eternity’; ‘symbolic inklings of eternity’;

Eternitynoun

endless life after death

‘immortal souls destined for eternity’;

Eternitynoun

used euphemistically to refer to death

‘he could have crashed the car and taken them both to eternity’;

Eternitynoun

a period of time that seems very long, especially on account of being tedious or annoying

‘a silence that lasted an eternity’;

Eternity

Eternity, in common parlance, means infinite time that never ends (or the quality, condition or fact of being eternal). Classical philosophy, however, defines eternity as what exists outside time - as in describing supernatural beings and forces, whereas sempiternity corresponds to the infinitely temporal, non-metaphoric definitions, as recited in requiem prayers for the dead.