eternity

noun5

1. •
   time or life that goes on forever, with no point at which it stops

   • This theory regards creation as an act of God in eternity past. — 1886
2. •
   A period of time which extends infinitely far into the future.

   • Every niche was filled by a funeral urn, and by marble shapes that bent down in a pale eternity of sorrow. — 1837
3. •
   The remainder of time that elapses after death.
4. •
   (informal) A comparatively long time.

   • It's been an eternity since we last saw each other.
5. •
   Existence outside of time.