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English definition of “bygone”

bygone

noun [plural]     /ˈbaɪ.ɡɒn/ US  /-ɡɑːn/
let bygones be bygones used to tell someone that they should forget about unpleasant things that happened in the past, and especially to forgive and forget something bad that someone has done to them : Just let bygones be bygones and be friends again.Making and accepting apologies
(Definition of bygone noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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