adj. 25B6; adjective
I wasn't gone long : AWAY, absent, off, out; missing, unavailable.
those days are gone : PAST, over (and done with), no more, done, finished, ended; forgotten, dead and buried.
the milk's all gone : USED UP, consumed, finished, spent, depleted; at an end.
an aunt of mine, long since gone : DEAD, expired, departed, no more, passed on/away; late, lost, lamented; perished, fallen; defunct, extinct; informal six feet under, pushing up daisies; formal deceased; euphemistic with God, asleep, at peace.
present, here, alive.