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
Create zones that give your patio a purpose The most functional patios don’t try to do everything in one undefined space.
—Lauren Jarvis-Gibson, Sacbee.com, 30 Apr. 2026
Taken together, these disparate elements have created a new realm of media players that remains largely undefined.
—Caitlin White, Variety, 29 Apr. 2026
Texas regulators flagged dozens of deficiencies in Camp Mystic's emergency plan, saying missing flood maps, unclear evacuation procedures and undefined staff roles could hinder responses during disasters or medical emergencies.
—Doug Myers, CBS News, 24 Apr. 2026
Sid Vangala, senior AI systems engineer and architect at MasTec, said the industry is entering an era where responsibility boundaries are completely undefined.
—Arthur Zaczkiewicz, Footwear News, 20 Apr. 2026
See All Example Sentences for undefined
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Lauren Jarvis-Gibson, Sacbee.com, 30 Apr. 2026
Taken together, these disparate elements have created a new realm of media players that remains largely undefined.
—Caitlin White, Variety, 29 Apr. 2026
Texas regulators flagged dozens of deficiencies in Camp Mystic's emergency plan, saying missing flood maps, unclear evacuation procedures and undefined staff roles could hinder responses during disasters or medical emergencies.
—Doug Myers, CBS News, 24 Apr. 2026
Sid Vangala, senior AI systems engineer and architect at MasTec, said the industry is entering an era where responsibility boundaries are completely undefined.
—Arthur Zaczkiewicz, Footwear News, 20 Apr. 2026
See All Example Sentences for undefined
Cite this Entry
“Undefined.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undefined. Accessed 2 May. 2026.
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