n. 25B6; noun
the memory will remain for eternity : EVER, all time, perpetuity.
(Theology) souls destined for eternity : THE AFTERLIFE, everlasting life, life after death, the hereafter, the afterworld, the next world; heaven, paradise, immortality.
(informal) I waited an eternity for you : A LONG TIME, an age, ages, a lifetime; hours, years, aeons; forever; informal donkey's years, a month of Sundays; Brit. informal yonks.