un·​con·​trolled | \ˌən-kən-ˈtrōld \

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

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Examples of uncontrolled in a Sentence

Recent Examples on the Web

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 In addition, uncontrolled and unregulated urbanization in city centers has pushed people into areas that border forests, leaving their homes vulnerable. Nektaria Stamouli, WSJ, "Greek Wildfires Devastate Resort Areas Near Athens, Killing Scores," 24 July 2018 Breaking traditions further, Lisa often uses traditional Chinese ink and watercolor materials in a nontraditional uncontrolled, freeflowing way often mixed with unconventional materials. Tara Massouleh, AL.com, "April Events: Food festivals, Magic City Art Connection, and more," 6 Apr. 2018 Tiangong-1 is far from the biggest thing to fall out of space uncontrolled. Angela Fritz, Washington Post, "A Chinese spacecraft is falling out of the sky. It’s not supposed to happen like this.," 28 Mar. 2018 Whatever their ages, all of us are part of Generation Rx — a huge, uncontrolled experiment with little precedent and few guideposts. Benedict Carey, New York Times, "Antidepressants and Withdrawal: Readers Tell Their Stories," 17 Apr. 2018 Last year, Chinese officials confirmed Tiangong-1 - Chinese for Heavenly Place - would have an uncontrolled entry into the Earth's atmosphere this spring, setting off the space watch for the object. Leada Gore, AL.com, "Tiangong-1: Chinese space station expected to fall to Earth this weekend; where will pieces land?," 31 Mar. 2018 While posing minimal risk to humans, the uncontrolled re-entry of the space lab is a blot on China's ambitious space program. Katie Hunt, CNN, "Chinese space lab to fall to Earth within days in 'fiery demise'," 26 Mar. 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.

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First Known Use of uncontrolled

circa 1535, in the meaning defined above

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Last Updated

15 Nov 2018

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Time Traveler for uncontrolled

The first known use of uncontrolled was circa 1535

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More Definitions for uncontrolled


un·​con·​trolled | \ˌən-kən-ˈtrōld\

Kids Definition of uncontrolled

: not being controlled


un·​con·​trolled | \ˌən-kən-ˈtrōld \

Medical Definition of uncontrolled 

1 : not being under control uncontrolled hypertension

2 : not incorporating suitable experimental controls uncontrolled drug trials

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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).


noxious or harmful

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