sine qua non

noun

ˌsi-ni-ˌkwä-ˈnän How to pronounce sine qua non (audio)
Definition of sine qua nonnext
as in must
something necessary, indispensable, or unavoidable an extensive grounding in mathematics is a sine qua non for a career in architecture

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of sine qua non The image of Toyotas and Datsuns — soon rebranded as Nissans — went from quirky to sine qua non. — Patt Morrison, Los Angeles Times, 18 Mar. 2026 The singing actors in opera do well to use that tool kit, too—but their sine qua non is the voice. — Matthew Gurewitsch, Air Mail, 21 Feb. 2026 While not denying the parallels between Muggle and magical technologies, Oakes’s conclusions depend on ignoring magical people’s complete dependence on a wand—the indisputable sine qua non of reliable spellwork. — Literary Hub, 26 June 2025 For those in Mnangagwa’s Lacoste faction, direct experience in the liberation war is a sine qua non for any successor candidate. — Philip Martin, Foreign Affairs, 17 Nov. 2017 See All Example Sentences for sine qua non
Recent Examples of Synonyms for sine qua non
  1. must
  2. requirement
  3. necessity
Noun
  • Tantísimo, a farm-to-table Latin American restaurant, shares a patio with the boarding house and is a must for dinner or Sunday brunch.
    — Condé Nast, Condé Nast Traveler, 20 Oct. 2026
  • As always, installing updates in a timely manner is also a must.
    — Dan Goodin, ArsTechnica, 15 Oct. 2026
Definition of must
Noun
  • However, the bill would also preempt certain state requirements covering public risk disclosures, independent evaluations, and critical incident reporting.
    — Aamir Khollam, Interesting Engineering, 17 Oct. 2026
  • The legislation enacts new work requirements and greater vetting for Medicaid, the low-income program that thousands of Alaskans depend on for healthcare.
    — Matthew Choi The Washington Post, Arkansas Online, 17 Oct. 2026
Definition of requirement
Noun
  • Waitlists for child care assistance exploded, forcing low-income households to sideline a parent from the workforce or forgo necessities to foot a child care bill.
    — Moriah Balingit, Los Angeles Times, 21 Oct. 2026
  • Waitlists for childcare assistance exploded, forcing low-income households to sideline a parent from the workforce or forgo necessities to foot a childcare bill.
    — ABC News, ABC News, 21 Oct. 2026
Definition of necessity

Browse Nearby Words

sincerity
sine qua non
sine qua nons
See all Nearby Words

Cite this Entry

“Sine qua non.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/sine%20qua%20non. Accessed 22 Oct. 2026.

Copy Citation
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Last Updated: - Updated example sentences

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of vocation

See Definitions and Examples »

Popular in Grammar & Usage

See More

Merriam-Webster’s Great Big List of Words You Love to Hate

'Can' vs. 'May'

'Affect' vs. 'Effect'

More Commonly Mispronounced Words

Is it 'nerve-racking' or 'nerve-wracking'?
See More

Popular in Wordplay

See More

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

The Words of the Week - Oct. 23

Even More Bird Names that Sound Like Insults (and Sometimes Are)

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

Merriam-Webster’s Great Big List of Words You Love to Hate

The Longest Long Words List

9 Words That Sound Like Insults But Aren't
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
artwork of illustrated limes with the text limes and smile with an arrow connecting the two words
Quiz: Spot the Anagram! Scramble these words to find new words with the e...
See All