This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Time without beginning or end; infinite time.

n. The state or quality of being eternal.

n. The timeless state following death.

n. The afterlife; immortality.

n. A very long or seemingly endless time: waited in the dentist's office for an eternity.

n. Existence without end, infinite time.

n. Existence outside of time.

n. A period of time which extends infinitely far into the future.

n. The remainder of time that elapses after death.

n. A comparatively long time.

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

n. Condition which begins at death; immortality.

n. The condition or quality of being eternal.

n. The state of things in which the flow of time has ceased.

n. Existence outside of the relations of time.

n. The state or condition of existence preceding life, or subsequent to death.

n. Indefinite duration of time or vast extent of space; anything that seems endless; endless round: as, an eternity of suspense; the great desert with its eternity of sand.

n. time without end

n. a seemingly endless time interval (waiting)

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

"We have been blinded by our own cleverness, blinded by false perceptions of those qualities that we term eternity and infinity."

interval    time interval    being    beingness    existence   

constancy    endlessness   

eternize    eternal   

immortality   

fraternity    modernity   

immortality    happiness    bliss    reality    universe    abyss    misery    heaven    infinity    salvation