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bygone

American  
[bahy-gawn, -gon] / ˈbaɪˌgɔn, -ˌgɒn /

adjective

  1. past; gone by; earlier; former.

    The faded photograph brought memories of bygone days.


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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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.

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Vocabulary lists containing bygone

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

Like a detective connecting with a source in a classic movie from a bygone era, Nicolas Cage met with showrunner Oren Uziel for lunch at Bottega Louie in downtown L.A. back in 2024.

From Los Angeles Times • May 20, 2026

Relying solely on geographic diversification methods, in which portfolios seek to offset losses in one market in lieu of another, also belongs to a bygone era, according to Holzer.

From Barron's • May 14, 2026

In TCM, Turner created a viewing experience that wasn’t simply passive but curated, designed to educate and cultivate appreciation for bygone eras of filmmaking.

From Salon • May 8, 2026

They already knew a great deal about the prehistoric creatures that roamed the Serengeti in bygone years.

From "My Life with the Chimpanzees" by Jane Goodall

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