undefined

adjective

un·​de·​fined ˌən-di-ˈfīnd How to pronounce undefined (audio)
Synonyms of undefined
: not defined: such as
a
: not clearly or precisely shown, described, or limited
undefined rules
undefined powers
a vague, undefined feeling of dread
… the true outlines of Clinton's foreign policy remain undefined.William Greider
b
: not provided with a definition
an undefined dictionary entry

Examples of undefined in a Sentence

plagued by undefined worries that kept her awake at night
Recent Examples on the Web
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.
But their relationship remains undefined, and kind of over after Carter drunkenly ruins Beulah's big party. Bryan Alexander, USA Today, 3 July 2026 The top players’ form is patchy or simply undefined. Ava Wallace, New York Times, 27 June 2026 Anyway, things continue to be tenuous at The Bear, as Sydney, Richie, Natalie and Carmy are forced to adjust to their new status quo, with a wholly undefined new power structure. Daniel Fienberg, HollywoodReporter, 25 June 2026 Backed by key rivals yet still largely undefined on national policy, Burnham faces calls for a full contest as his party deliberates. Jill Lawless, Los Angeles Times, 23 June 2026 See All Example Sentences for undefined

Word History

First Known Use

1611, in the meaning defined above

Time Traveler
The first known use of undefined was in 1611

Browse Nearby Words

Cite this Entry

“Undefined.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undefined. Accessed 5 Jul. 2026.

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