adverb
(archaic except literary) At some time in the past; formerly, once upon a time.
At times, on occasion, sometimes.
Preceded by of or this: for some time that has passed.
adjective
(archaic except literary) At some time in the past; former, sometime.
(obsolete) Of a person: deceased, late.
conjunction
During the same time that; while.
Up to the time that; till, until.