un·​dis·​ci·​plined | \ˌən-ˈdi-sə-plənd \

Definition of undisciplined 

: lacking in discipline or self-control undisciplined behavior an unruly and undisciplined child

Examples of undisciplined in a Sentence

Recent Examples on the Web

The administration’s approach has prompted criticism from lawmakers, particularly those from farm states, who say Mr. Trump is approaching a serious issue in an undisciplined way that could backfire. New York Times, "U.S. Threatens Tariffs on $200 Billion of Chinese Goods, From Tilapia to Handbags," 10 July 2018 Support of the teacher by the parents has a profound influence on the child, who realizes he or she will not be excused for undisciplined behavior. WSJ, "Catholic School Output Good, Input Limited," 7 June 2018 Yet to critics, the Chinese approach is akin to what corporate Japan did in the 1980s: overpay for trophy assets in a hopelessly undisciplined way. The Economist, "Chinese and US tech giants go at it in emerging markets," 5 July 2018 But the best way to summarize it for our purposes is that leakiness in a White House can reflect a undisciplined and paranoid environment where self-preservation can outweigh loyalty, including (or especially) to the president himself. Mark Leibovich, New York Times, "The Risky Business of Speaking for President Trump," 23 May 2018 Argentina was so open, and so undisciplined, and had so many flaws in the structure and the speed of their team. Grant Wahl And Brian Straus, SI.com, "World Cup Daily Podcast: How Finalists France, Croatia Mirror Their 1998 Teams," 12 July 2018 Lindholm capped the scoring with 0.1 seconds left to finally seal the win, but Carlyle was disappointed the Ducks let the Penguins back in the game with undisciplined penalties knowing Pittsburgh has the best power play in the NHL. USA TODAY, "Anaheim Ducks beat Pittsburgh Penguins thanks to four second-period goals," 18 Jan. 2018 But there was nothing undisciplined about his life in the kitchen or as a writer. Corby Kummer, The Atlantic, "Remembering Anthony Bourdain," 8 June 2018 Their work is haphazard and clunky and every bit as undisciplined as Dewey. David Lyman, Cincinnati.com, "Review: Andrew Lloyd Webber kinda ruins 'School of Rock'," 22 Feb. 2018

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

14th century, in the meaning defined above

Keep scrolling for more

Learn More about undisciplined

Share undisciplined

Statistics for undisciplined

Last Updated

16 Oct 2018

Look-up Popularity

Time Traveler for undisciplined

The first known use of undisciplined was in the 14th century

See more words from the same century

More from Merriam-Webster on undisciplined

Spanish Central: Translation of undisciplined

Comments on undisciplined

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


by force of circumstances

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

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!