Synonyms of antediluvian

antediluvian 1 of 2

adjective

ˌan-ti-də-ˈlü-vē-ən 

as in ancient

dating or surviving from the distant past

found evidence in the Middle East of an antediluvian people previously unknown to history

Synonyms & Similar Words

• ancient
• venerable
• medieval
• old
• antique
• hoary
• archaic
• prehistoric
• antiquated
• immemorial
• age-old
• hoar
• aged
• outmoded
• traditional
• dateless
• obsolete
• fusty
• out-of-date
• geriatric
• aging
• old-time
• old-world
• Noachian
• dated
• retro
• enduring
• primeval
• archaistic
• vintage
• old-fashioned
• durable
• classical
• permanent
• primordial
• passé
• moldy
• ageless
• timeless
• lasting
• tried-and-true
• timeworn
• long-lived
• mature
• classic
• time-honored
• tried
• hallowed
• time-tested

Antonyms & Near Antonyms

• modern
• new
• recent
• young
• youthful
• current
• contemporary
• fresh
• present-day
• latest
• novel
• vernal
• ultramodern
• untried
• unused
• untested
• mod
• brand-new
• unworn

antediluvian

2 of 2

noun

as in conservative

a person with old-fashioned ideas

thought his dad was an antediluvian for refusing to use any social media

Synonyms & Similar Words

• conservative
• fossil
• fogy
• veteran
• mossback
• reactionary
• stick-in-the-mud
• fuddy-duddy
• stuffed shirt
• Colonel Blimp
• fud
• dodo
• rightist
• Tory
• old hand
• mandarin
• old maid
• old-timer

Antonyms & Near Antonyms

• modern
• trendy
• hipster
• liberal
• progressive
• radical

Example Sentences

Recent Examples of antediluvian

Adjective

This antediluvian town knows — and that, too, is part of its multimillion-dollar charm — that in a world of rapidly upgrading software and all-subsuming artificial intelligence, natural wisdom must be nurtured and celebrated. — Kalpana Mohan, Mercury News, 3 Dec. 2025

Not a bad start, definitely auspicious, which makes the antediluvian inspirations behind these sparkling party dresses all the more mysterious. — Rachel Elspeth Gross, Forbes.com, 15 June 2025

Image Still, Professor Bogdanor said, the antediluvian nature of the Lords eroded faith in government generally, particularly among young people. — Mark Landler, New York Times, 24 Dec. 2024

Eliminating antediluvian student loan debts held by vulnerable older adults seems both just and good public policy. — Next Avenue, Forbes, 11 Oct. 2024

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