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

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 The safety institute cited uncontrolled ventilation as a contributing factor in the deaths of at least eight firefighters in the last few years. Mike Hendricks, kansascity, "In a tragic loop, firefighters continue to die from preventable mistakes," 13 July 2018 If that treaty dies, and the way is open for an uncontrolled race to build weapons of every description, the budgetary consequences would be terrifying, though not quite as terrifying as the consequences for humanity. The Economist, "What Donald Trump and Vladimir Putin ought to talk about in Helsinki," 12 July 2018 The surviving columns were bolted to the floors, which were exposed to uncontrolled fires. New York Times, "The Last 9/11 Fire Chief Bows Out," 10 July 2018 Rampant, uncontrolled mining also uses huge amounts of groundwater, pushing the water table ever lower. Simon Denyer, Washington Post, "Mongolia’s nomadic way of life threatened by climate change, neglect, modernity," 8 July 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

23 Aug 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).


to deposit or conceal in a hiding place

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