un·​checked | \ ˌən-ˈchekt How to pronounce unchecked (audio) \

Definition of unchecked

: not checked: such as
a : not hindered, slowed, or restrained unchecked growth
b : not verified unchecked data/information

Keep scrolling for more

Examples of unchecked in a Sentence

Recent Examples on the Web The US Department of Agriculture has warned that the insects could devastate American timber industries and forests if left unchecked. Sarah Lazarus, CNN, "Can tech save the kakapo, New Zealand's 'gorgeous, hilarious' parrot?," 26 Dec. 2019 In seeking to oust Trump from office, House Democrats assert that his actions betrayed the nation and his pattern of misconduct will continue if left unchecked. Chicago Tribune, Twin Cities, "Other voices: The rebuke to Trump that both parties should deliver," 18 Dec. 2019 If left unchecked, the Mississippi could eventually cut off the peninsula from the rest of the state entirely. Chicago Tribune Staff, chicagotribune.com, "Daywatch: Charges filed in killing of UIC student, Mississippi River literally dividing a community and your complete Thanksgiving guide," 26 Nov. 2019 Free radicals, when left unchecked, can destabilize other molecules around them and cause cellular damage. Cosby Stone, The Conversation, "Vitamin E and vaping injuries: What’s safe in your diet is rarely safe in your lungs," 22 Nov. 2019 The plan states that just as Big Tobacco intentionally deceived consumers and marketed towards children, the marijuana industry if left unchecked could do the same. Caitlin Conant, CBS News, "2020 Daily Trail Markers: Democratic candidates said to be "blindsided" by Trump's trip to HBCU," 24 Oct. 2019 Climate change, left unchecked, will undo many of the economic and social gains in cities in recent decades, Appleby said. Scientific American, "Cities Are Behind in Gauging Their Climate Risk," 24 Oct. 2019 Left unchecked, the herd could reach 1,500 in several years, severely damaging the landscape and water resources, the park says. USA TODAY, "Cat burglar, prison bats, USS Arizona Memorial: News from around our 50 states," 4 Sep. 2019 After 20 years, some landlords are maintaining properties to pass the test, addressing cosmetic issues while leaving underlying problems unchecked. Danielle Ohl, ProPublica, "Trump Called Baltimore “Vermin Infested” While the Federal Government Fails to Clean Up Rodents in Subsidized Housing," 14 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unchecked.' 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 unchecked

15th century, in the meaning defined above

Keep scrolling for more

Learn More about unchecked

Time Traveler for unchecked

Time Traveler

The first known use of unchecked was in the 15th century

See more words from the same century

Statistics for unchecked

Last Updated

17 Jan 2020

Cite this Entry

“Unchecked.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/unchecked. Accessed 24 January 2020.

Keep scrolling for more

More Definitions for unchecked


How to pronounce unchecked (audio)

English Language Learners Definition of unchecked

: not stopped, slowed, or controlled : not checked

Keep scrolling for more

More from Merriam-Webster on unchecked

Thesaurus: All synonyms and antonyms for unchecked

Spanish Central: Translation of unchecked

Nglish: Translation of unchecked for Spanish Speakers

Comments on unchecked

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


a feeling of well-being or elation

Get Word of the Day daily email!

Test Your Vocabulary

Intact Latin Quiz

  • roman tablet
  • What did focus mean in Latin?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

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!