undefined

adjective

ˌən-di-ˈfīnd How to pronounce undefined (audio)
Definition of undefinednext
as in vague
not seen or understood clearly plagued by undefined worries that kept her awake at night

Synonyms & Similar Words

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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 undefined How a spouse chooses to inhabit a highly visible but largely undefined role is visually articulated through their fashion. — Anna Cafolla, Vogue, 25 Sep. 2026 An undefined position means scattershot and inconsistent AI usage at your company. — Rob Black, Forbes.com, 23 Sep. 2026 The role of the European Space Agency, perhaps NASA’s most enduring international partner, on the Moon Base program remains undefined. — Stephen Clark, ArsTechnica, 22 Sep. 2026 In a matter of minutes, my past and my still-undefined future crystallized. — Ayman M. Mohyeldin, Vanity Fair, 11 Sep. 2026 See All Example Sentences for undefined
Recent Examples of Synonyms for undefined
  1. vague
  2. faint
Adjective
  • The steps and skills required to adequately shop for groceries or pick out the right kindergarten for a child are broad and vague.
    — Lisa Eadicicco, CNN Money, 2 Nov. 2026
  • Trump’s allegations, the judge found, were vague, conclusory and sometimes contradicted by the article itself.
    — Antonio María Delgado, Miami Herald, 2 Nov. 2026
Definition of vague
Adjective
  • As light mist obscured the far-off Chicago skyline, only the faint sounds of metal cranes clanging and construction vehicles beeping in the distance broke up the quiet morning at Park 566 in South Shore.
    — Finnegan Belleau, Chicago Tribune, 6 Nov. 2026
  • The brightest planets are 100,000 times fainter than their host stars, meaning spotting them is like observing a firefly hovering around a lighthouse.
    — Robert Lea, Space.com, 6 Nov. 2026
Definition of faint

Browse Nearby Words

undefinable
undefined
undeformed
See all Nearby Words

Cite this Entry

“Undefined.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undefined. Accessed 9 Nov. 2026.

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