ir·​reg·​u·​lar·​i·​ty | \ i-ˌre-gyə-ˈler-ə-tē How to pronounce irregularity (audio) , ˌi(r)-, -ˈla-rə- \
plural irregularities

Definition of irregularity

1 : something that is irregular (such as improper or dishonest conduct) alleged irregularities in the city government
2 : the quality or state of being irregular

Examples of irregularity in a Sentence

the irregularity of his behavior He is suffering from irregularity.
Recent Examples on the Web The trajectories of various sports balls are affected not just by their diameter and speed but also by any tiny irregularities on their surface. Jennifer Ouellette, Ars Technica, "Physics holds the secret to volleyball’s highly unpredictable “float serve”," 14 Nov. 2019 The move comes after a State Police troop was at the center of a 2016 inspector general’s investigation into irregularities in the awarding of tow contracts along the Massachusetts Turnpike., "Years after a state official probed irregularities into state tow contracts along the Mass. Pike, Massachusetts State Police announced Monday a new contracting policy for tow companies in an effort to “ensure a more transparent process,” according to the head of the agency.," 17 Sep. 2019 The movement’s leaders were arrested in neighboring Nigeria last year and taken into custody under circumstances marked by irregularities and controversies. Amindeh Blaise Atabong, Quartz Africa, "Cameroon’s Anglophone separatist leaders have been jailed for life," 20 Aug. 2019 An audit by the Organization of American States concluded there were irregularities in the vote and Morales quit after the military urged him to do so. Washington Post, "Bolivia’s socialist party considers a future without Morales," 21 Nov. 2019 Moore and her supporters claimed there were widespread irregularities with the absentee ballots, leading to a lawsuit calling for a do-over of the primary election. Russell Blair,, "Capitol Week in Review: Tolls 2.0 and a recap of local elections," 8 Nov. 2019 If there are certain irregularities in the working and functioning of such banks and institutions, the citizens certainly have a right to know about the same. Shailesh Gandhi, Quartz India, "Better transparency could have averted the crisis that is rocking India’s PMC Bank," 10 Oct. 2019 Needless to say, being able to track my cycle, symptoms, and any irregularities easily from the watch will certainly help me have a much more informed and less awkward chat with my ob-gyn going forward. Susan Brickell,, "I Tried the Apple Watch Series 5—and It Legit Made Tracking My Period *So* Much Easier," 7 Oct. 2019 That irregularity is perhaps on par with the latency found in wireless systems like the HTC Vive Wireless Adapter or maybe a hair faster than those. Sam Machkovech, Ars Technica, "We put Oculus Quest’s two craziest new VR features through their paces," 27 Sep. 2019

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

14th century, in the meaning defined at sense 1

History and Etymology for irregularity

Middle English irregularite, from Medieval Latin irregularitat-, irregularitas, from Late Latin irregularis

Keep scrolling for more

Learn More about irregularity

Time Traveler for irregularity

Time Traveler

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

See more words from the same century

Statistics for irregularity

Last Updated

8 Jan 2020

Cite this Entry

“Irregularity.” The Dictionary, Merriam-Webster Inc., Accessed 19 January 2020.

Keep scrolling for more

More Definitions for irregularity


How to pronounce irregularity (audio)

English Language Learners Definition of irregularity

: the quality or state of being irregular
: something that is irregular
: something that is not usual or proper and that usually indicates dishonest behavior


ir·​reg·​u·​lar·​i·​ty | \ i-ˌre-gyə-ˈler-ə-tē How to pronounce irregularity (audio) \
plural irregularities

Kids Definition of irregularity

1 : the quality or state of being unusual, uneven, or happening at different times
2 : something that is unusual, uneven, or happening at different times


ir·​reg·​u·​lar·​i·​ty | \ (ˌ)ir-ˌ(r)eg-yə-ˈlar-ət-ē How to pronounce irregularity (audio) \
plural irregularities

Medical Definition of irregularity

1 : the quality or state of being irregular irregularity of breathing hormonal irregularities
2 : occasional constipation more fiber in one's diet may help relieve irregularity

Keep scrolling for more


ir·​reg·​u·​lar·​i·​ty | \ ir-ˌre-gyə-ˈlar-ə-tē How to pronounce irregularity (audio) \
plural irregularities

Legal Definition of irregularity

: something that is irregular an irregularity in the proceeding

Keep scrolling for more

More from Merriam-Webster on irregularity

Rhyming Dictionary: Words that rhyme with irregularity

Spanish Central: Translation of irregularity

Nglish: Translation of irregularity for Spanish Speakers

Britannica English: Translation of irregularity for Arabic Speakers

Comments on irregularity

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


to insert between existing elements

Get Word of the Day daily email!

Test Your Vocabulary

The Eponym Quiz

  • rubens painting
  • Which is the best synonym of bowdlerize?
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!