bygone

The definition of bygone means something that is in the past.

(noun)

An example of a bygone is an old fight that a couple decide to leave in the past.

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See bygone in Webster's New World College Dictionary

adjective

that has or have gone by; past; former

noun

anything that is gone or past

See bygone in American Heritage Dictionary 4

adjective
Gone by; past: bygone days.
noun
One, especially a grievance, that is past: Let bygones be bygones.

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