un·​con·​trolled | \ ˌən-kən-ˈtrōld How to pronounce uncontrolled (audio) \

Definition of uncontrolled

: 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

Keep scrolling for more

Examples of uncontrolled in a Sentence

Recent Examples on the Web

The row over how to handle the migrants after they were picked up near the Libyan coast in December again highlighted the rift among European Union members on the bloc’s approach to uncontrolled migration. Eric Sylvers, WSJ, "Standoff Over Migrants Stranded at Sea Ends as Europe Opens Doors," 9 Jan. 2019 An uncontrolled experiment is already underway concerning the effect of human CO2 on the climate. Holman W. Jenkins, WSJ, "If California Was Serious About Climate," 31 Aug. 2018 In an uncontrolled and undocumented way, the study has been proceeding on a mass scale for the past 80 years. Jennifer Traig, WSJ, "The Making of the Picky Eater," 11 Jan. 2019 During the caution between the second and third stages, Truex's team was penalized for an uncontrolled tire, dropping him to 19th place. Fox News, "Kyle Busch wins NASCAR Richmond race from the back of the pack," 24 Sep. 2018 Still, Moussouris' concern was for her physical safety more than her privacy; despite the new security policies, Caesars doesn't control access to its elevators by room key, and there is largely uncontrolled public access to the hotel's towers. Sean Gallagher, Ars Technica, "Caesars Palace not-so-Praetorian guards intimidate DEF CON goers with searches [Updated]," 13 Aug. 2018 The fires are still uncontrolled and are spreading, forcing road and trail closures. Avery Thompson, Popular Mechanics, "Glacier National Park Wildfires Force Evacuations," 13 Aug. 2018 In Southern California, the currently uncontrolled Woolsey fire in Ventura County and Malibu has burned over 70,000 acres of land. Halie Lesavage, Glamour, "Bella Hadid Posted a Heartbreaking Instagram About the California Wildfires," 10 Nov. 2018 Despite the city’s best efforts, planners struggle with the legacy of uncontrolled industrial zoning, says Sicotte. Patrick Sisson, Curbed, "Booming postindustrial neighborhoods often overlook polluted past," 9 Oct. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'uncontrolled.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of uncontrolled

circa 1535, in the meaning defined above

Keep scrolling for more

Learn More about uncontrolled

Statistics for uncontrolled

Last Updated

17 May 2019

Look-up Popularity

Time Traveler for uncontrolled

The first known use of uncontrolled was circa 1535

See more words from the same year

Keep scrolling for more

More Definitions for uncontrolled



English Language Learners Definition of uncontrolled

: happening or done without being stopped, slowed, or controlled


un·​con·​trolled | \ ˌən-kən-ˈtrōld\

Kids Definition of uncontrolled

: not being controlled


un·​con·​trolled | \ ˌən-kən-ˈtrōld How to pronounce uncontrolled (audio) \

Medical Definition of uncontrolled

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

Keep scrolling for more

Comments on uncontrolled

What made you want to look up uncontrolled? Please tell us where you read or heard it (including the quote, if possible).


to speak slightingly about or to degrade

Get Word of the Day daily email!

Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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