Synonyms of uncontrollednext
: not controlled: such as
a
: happening or done without being stopped, slowed, or controlled
an uncontrolled tantrum
his uncontrolled anger
uncontrolled hypertension
uncontrolled urban sprawl
b
: not conducted or maintained in accordance with fixed rules, restraints, or procedures
results from an uncontrolled study
c
: not regulated by law with regard to possession and use
uncontrolled substances

Examples of uncontrolled in a Sentence

a tirade filled with uncontrolled anger about what the government was doing
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.
OpenAI disclosed that test versions of its AI models slipped their offline confines, accessed the internet and hacked into rival startup Hugging Face, triggering alarm over uncontrolled, rule-breaking machines. Los Angeles Times, 29 July 2026 Because shark teeth can easily tear through major arteries, veins and tendons, uncontrolled blood loss is the biggest immediate threat. Khloe Quill, FOXNews.com, 29 July 2026 The match ended 1-1 (guess who scored for France), Italy won a penalty shootout 5-3, and Zidane’s moment of uncontrolled rage entered sporting infamy. Charlotte Harpur, New York Times, 28 July 2026 Either way, the breakout was widely considered a cautionary tale about the risks of uncontrolled AI. ABC News, 26 July 2026 See All Example Sentences for uncontrolled

Word History

First Known Use

circa 1535, in the meaning defined above

Time Traveler
The first known use of uncontrolled was circa 1535

Browse Nearby Words

Cite this Entry

“Uncontrolled.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/uncontrolled. Accessed 5 Aug. 2026.

Medical Definition

uncontrolled

adjective
1
: not being under control
uncontrolled hypertension
2
: not incorporating suitable experimental controls
uncontrolled drug trials

More from Merriam-Webster on uncontrolled

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!