un·​dis·​ci·​plined | \ ˌən-ˈdi-sə-plənd How to pronounce undisciplined (audio) \

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 Lightning had to kill off two power-play chances in the second period to protect the one-goal lead before Florida’s Sam Bennett took an undisciplined penalty at 12:53. Erik Erlendsson, ajc, 27 May 2021 Biden’s discipline has baffled long-time Joe watchers, who note that as Vice President and Senator, Biden also earned a reputation for being undisciplined and veering off script. Brian Bennett, Time, 21 May 2021 At the stables, where one horse is the animal equivalent of Cole, wild and undisciplined, the young man learns the redemptive power of mucking out stables in a mesmerizing scene. Kyle Smith, National Review, 27 Apr. 2021 Galanis, who was introduced to Lloyd by her father, transformed her from a talented if undisciplined college player into one of the fittest, most technical players in the world. Kevin Baxter, Los Angeles Times, 9 Apr. 2021 Timme can be the difference because Baylor doesn't have anyone who can stop the 6-10 crafty big man, who's a phenomenal passer once teams start to double team or become undisciplined on defense. Scott Gleeson, USA TODAY, 5 Apr. 2021 To him, negative daydreams came in two forms: painful, obsessive fantasies, and an undisciplined inability to concentrate. New York Times, 10 Apr. 2021 Throughout the Noor trial, prosecutors sought to paint him as an undisciplined rookie who had violated his training at the Police Academy. Libor Jany, Star Tribune, 27 Mar. 2021 His audition for the leadoff spot didn’t last two weeks due to an undisciplined, over-aggressive approach at the plate. Evan Grant, Dallas News, 15 Mar. 2021

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.

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First Known Use of undisciplined

14th century, in the meaning defined above

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

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Last Updated

31 May 2021

Cite this Entry

“Undisciplined.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/undisciplined. Accessed 15 Jun. 2021.

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English Language Learners Definition of undisciplined

: behaving in a way that is not properly controlled, organized, serious, etc. : lacking discipline

More from Merriam-Webster on undisciplined

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