|Noah Webster's Dictionary|
1. (a.) Past; gone by.
2. (n.) Something gone by or past; a past event.
Bygone (2 Occurrences)
Romans 3:25 whom God did set forth a mercy seat, through the faith in his blood, for the shewing forth of His righteousness, because of the passing over of the bygone sins in the forbearance of God -- (YLT)
Job 8:8 "Please inquire of past generations. Find out about the learning of their fathers. (See RSV)