Synonym of eternity (“existence without end”)
Synonym of aevum (“the temporal mode of existence between time and eternity, said to be experienced by angels, saints, and celestial bodies (which medieval astronomy believed to be unchanging)”)
A mythical time in the infinite future that will never come.
An extremely long time.
We had to wait forever to get inside.
For all time, for all eternity; for a lifetime; for an infinite amount of time.
For a very long time, a seeming eternity.
Constantly or frequently.
Permanent, lasting; constant, perpetual.