bygone

American  

[bahy-gawn, -gon] / ˈbaɪˌgɔn, -ˌgɒn /

adjective

1. past; gone by; earlier; former.

   The faded photograph brought memories of bygone days.

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noun

1. Usually bygones. that which is past.

   Let's not talk of bygones.

idioms

1. let bygones be bygones, to decide to forget past disagreements; become reconciled.

   Let's let bygones be bygones and be friends again.

bygone British  

/ ˈbaɪˌɡɒn /

adjective

1. (usually prenominal) past; former

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noun

1. (often plural) a past occurrence

2. (often plural) an artefact, implement, etc, of former domestic or industrial use, now often collected for interest

3. to agree to forget past quarrels

Etymology

Origin of bygone

1375–1425; late Middle English (north) by-gane; see gone, by

Explanation

The adjective bygone is good for describing long-ago times. Your grandparents might enjoy looking at old photo albums and reminiscing about bygone days. A bygone era happened in the distant past, and a bygone sweetheart is an early romantic interest remembered by someone who's since lived a long life. You're most likely to see the phrase "bygone days" being used in a nostalgic way. If someone says, "Let bygones be bygones," they want to make up for long-ago slights and arguments, leaving them in the past where they belong.

Example Sentences

It was a crowd-pleasing moment, to be sure, but more in keeping with the bygone era of TV variety shows than with prime Broadway.

From Los Angeles Times • Jun. 22, 2026

“The kind of incrementalism that Eric Murphy seems to be doing is something from a bygone era, where people were more pragmatic in the movement and not punished for it,” she said.

From Salon • Jun. 8, 2026

Togelius’s and Hassabis’s origin stories are relics of a bygone era where gaming was the money-making machine and AI was a quixotic science experiment.

From MarketWatch • May 23, 2026

Readers will find engrossing case studies of well-known disasters such as the Titanic and the USS Indianapolis, as well as sections on bygone Viking wrecks and the mysterious “ghost ships” of seafaring lore.

From The Wall Street Journal • May 22, 2026

For dinner she is buttoned into a starchy dress from some bygone decade.

From "All the Light We Cannot See" by Anthony Doerr