unchecked
Britishadjective
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not prevented from continuing or growing
unchecked population growth
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not examined or inspected
adverb
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without being stopped or hindered
the virus could spread unchecked
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without being examined or inspected
our luggage passed unchecked through customs
Explanation
If something isn't held back or restrained, it's unchecked, like the unchecked growth of the weeds in your neighbor's garden. Use unchecked to describe things that are increasing or growing, especially if they're unwanted. The unchecked sprawl of a city might result in the loss of animal habitats, and your class's unchecked chatter will eventually make it impossible for you to hear the teacher when he tries to get your attention. This word comes from the verb check, "to hold or control," the way you control your opponent's king in a game of chess by putting it in check.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
But nothing has really changed about Reddit, which remains as inhospitable as ever to the kind of unchecked brand chatter that prevails elsewhere.
From The Wall Street Journal ● Aug. 14, 2026
A spokesperson for the industry body added it was "simply wrong" to suggest that betting shops are spreading "unchecked", adding around 3,000 shops have closed since 2019.
From BBC ● Aug. 10, 2026
Some investors are also concerned about Musk’s “basically unchecked power” over SpaceX and the company’s roughly $2 trillion valuation, she added.
From MarketWatch ● Jul. 9, 2026
The European Commission, in charge of EU trade policy, says the step is about slashing the financial burden on customs duties after the explosion in imports, and tackling the safety risks from unchecked goods.
From Barron's ● Jun. 30, 2026
The place had probably looked good once, but now unchecked ivy grew up its sides.
From "Made You Up" by Francesca Zappia
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
