undefined

adjective

un·​de·​fined ˌən-di-ˈfīnd How to pronounce undefined (audio)
: 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.
And trust drives engagement, growth and influence far more effectively than trying to please a broad, undefined audience. Conrad Young, Forbes.com, 5 June 2025 Even though the offer was undefined, Adams was intrigued. Matthew Fairburn, New York Times, 2 June 2025 Internal dynamics are mostly undefined; individual personalities are thinly sketched at best. Alison Herman, Variety, 28 May 2025 This is a sweeping, undefined provision that could rule out any changes to local growth guidelines in Florida unless developers agree and sponsor the change. Paul Owens, The Orlando Sentinel, 16 May 2025 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

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Cite this Entry

“Undefined.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undefined. Accessed 11 Jun. 2025.

Last Updated: - Updated example sentences
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