as in vague
not seen or understood clearly
plagued by undefined worries that kept her awake at night
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Recent Examples of undefined
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
Leave ownership undefined, and the moon will become a playground for politicians and their cronies.
—Antony Davies, Boston Herald, 19 Apr. 2026
Transit conditions, toll arrangements and the legal framework for passage remain undefined, deterring ship owners from passing through the waterway, according to maritime research firm Windward.
—Anniek Bao,joseph Wilkins, CNBC, 9 Apr. 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
See All Example Sentences for undefined
Arthur Zaczkiewicz, Footwear News, 20 Apr. 2026
Leave ownership undefined, and the moon will become a playground for politicians and their cronies.
—Antony Davies, Boston Herald, 19 Apr. 2026
Transit conditions, toll arrangements and the legal framework for passage remain undefined, deterring ship owners from passing through the waterway, according to maritime research firm Windward.
—Anniek Bao,joseph Wilkins, CNBC, 9 Apr. 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
See All Example Sentences for undefined
Recent Examples of Synonyms for undefined
Adjective
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Still, even after the election, Magyar has remained relentlessly on message—which is to say, vague and tight-lipped, leaving several inconvenient dilemmas unaddressed.—
Andrew Marantz,
New Yorker,
9 May 2026
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Later, Liu Kang himself seemingly dies in a showdown with Shao Kahn, although his fate is kept a bit more vague.—
Brendan Morrow,
USA Today,
9 May 2026
Adjective
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That's because the waning gibbous moon will appear in the sky at the same time, most likely outshining many of the fainter shooting stars.—
Anthony Wood,
Space.com,
4 May 2026
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That's because, as Gray explained, the impact will be too faint for observations.—
Eric Lagatta,
USA Today,
4 May 2026
Cite this Entry
“Undefined.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/undefined. Accessed 10 May. 2026.
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