undefined
adjective
un·de·fined
ˌən-di-ˈfīnd 
: 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
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
But with many terms still undefined, small business owners must be nimble—leveraging digital tools, planning for financial flexibility, and preparing for multiple scenarios to stay ahead.
—Eric Youngstrom, Forbes.com, 8 Sep. 2025
The two nations maintain a heavy military presence along their 2,100-mile (3,379-kilometer) de facto border, known as the Line of Actual Control (LAC) – a boundary that remains undefined and has been a persistent source of friction since their bloody 1962 war.
—Simone McCarthy, CNN Money, 31 Aug. 2025
When time off is undefined, the good ones don’t take PTO.
—Preston Fore, Fortune, 23 Aug. 2025
The younger Bayh is largely undefined.
—Hayleigh Colombo, IndyStar, 19 Aug. 2025
See All Example Sentences for undefined
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Eric Youngstrom, Forbes.com, 8 Sep. 2025
The two nations maintain a heavy military presence along their 2,100-mile (3,379-kilometer) de facto border, known as the Line of Actual Control (LAC) – a boundary that remains undefined and has been a persistent source of friction since their bloody 1962 war.
—Simone McCarthy, CNN Money, 31 Aug. 2025
When time off is undefined, the good ones don’t take PTO.
—Preston Fore, Fortune, 23 Aug. 2025
The younger Bayh is largely undefined.
—Hayleigh Colombo, IndyStar, 19 Aug. 2025
See All Example Sentences for undefined
Cite this Entry
“Undefined.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undefined. Accessed 16 Sep. 2025.
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