uncontrolled

adjective

un·​con·​trolled ˌən-kən-ˈtrōld How to pronounce uncontrolled (audio)
: 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.
Classic facial movements include smacking your lips, doing sucking motions, sticking your tongue out or against the inside of your cheek, grimacing, chewing, puffing out your cheeks and rapidly blinking your eyes, all in uncontrolled manners. Bruce Y. Lee, Forbes.com, 15 May 2025 Long story short, the uncontrolled airflow of a standard blow dryer can create tangles galore on loose to tight curl patterns while the nozzle detachment used to create a smooth blowout effect does away with curls entirely. Georgia Day, Vogue, 14 May 2025 The countries used drones and missiles against both military and civilian religious sites, adding unpredictability and risking uncontrolled escalation. Lisa Curtis, Foreign Affairs, 13 May 2025 One of those came down uncontrolled over Poland in February, scattering some debris but causing no injuries. ArsTechnica, 8 May 2025 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 4 Jun. 2025.

Medical Definition

uncontrolled

adjective
un·​con·​trolled ˌən-kən-ˈtrōld How to pronounce uncontrolled (audio)
1
: not being under control
uncontrolled hypertension
2
: not incorporating suitable experimental controls
uncontrolled drug trials

More from Merriam-Webster on uncontrolled

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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