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
Meghan had been presented with several tiara options and preferred an emerald tiara, but the undefined provenance of its jewels meant it was not deemed a suitable choice.
—Katie Nicholl, Vanity Fair, 30 Mar. 2026
In most cases, their roles are undefined, though a number are clearly there to deliver on Kennedy’s efforts to rewrite vaccination policy in ways that downplay the importance of and sow distrust in these key public health tools.
—Helen Branswell, STAT, 30 Mar. 2026
Rich Table’s palate is expansive, if intentionally undefined, with dishes that riff on French, Italian, Korean, Japanese and Chinese cooking.
—Cesar Hernandez, San Francisco Chronicle, 27 Mar. 2026
The White House is attempting to manage a large-scale military confrontation with an undefined exit strategy—a confrontation that is unnerving markets.
—Vivian Salama, The Atlantic, 24 Mar. 2026
See All Example Sentences for undefined
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Katie Nicholl, Vanity Fair, 30 Mar. 2026
In most cases, their roles are undefined, though a number are clearly there to deliver on Kennedy’s efforts to rewrite vaccination policy in ways that downplay the importance of and sow distrust in these key public health tools.
—Helen Branswell, STAT, 30 Mar. 2026
Rich Table’s palate is expansive, if intentionally undefined, with dishes that riff on French, Italian, Korean, Japanese and Chinese cooking.
—Cesar Hernandez, San Francisco Chronicle, 27 Mar. 2026
The White House is attempting to manage a large-scale military confrontation with an undefined exit strategy—a confrontation that is unnerving markets.
—Vivian Salama, The Atlantic, 24 Mar. 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 5 Apr. 2026.
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