irregularity

noun

ir·​reg·​u·​lar·​i·​ty i-ˌre-gyə-ˈler-ə-tē 

ˌi(r)-, 

-ˈla-rə-

plural irregularities

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

3

: constipation

Examples of irregularity in a Sentence

the irregularity of his behavior

He is suffering from irregularity.

Recent Examples on the Web

Since the ballot seizure, local election officials in Riverside County have debunked the allegations of irregularities by saying that the citizens' group's numbers were based on raw data that could have included unsigned ballots. —Laurie Perez, CBS News, 30 Mar. 2026

That includes women in perimenopause, women dealing with PMS or cycle irregularities, and anyone whose stress levels are clearly impacting their sleep, mood, or energy. —Rita Templeton, Flow Space, 30 Mar. 2026

Serbian independent monitors also reported scores of violent incidents and clashes in some of the towns, and voting irregularities during Sunday's election. —ABC News, 30 Mar. 2026

Mullin will also face congressional Democrats’ wrath as lawmakers on Capitol Hill have already begun to investigate DHS for the massive contracts to individuals and companies that were inexperienced, had connections to Noem’s staff, or contained other irregularities. —Anna Giaritelli, The Washington Examiner, 27 Mar. 2026

Word History

Etymology

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

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for irregularity

• peculiarity
• subsidiarity
• unfamiliarity
• unpopularity
• alterity
• asperity
• austerity
• celerity
• dexterity
• disparity
• hilarity
• molarity

Kids Definition

irregularity

noun

ir·​reg·​u·​lar·​i·​ty (ˌ)ir-ˌ(r)eg-yə-ˈlar-ət-ē 

plural irregularities

1

: the quality or state of being irregular

2

: something (as dishonest conduct) that is irregular

3

: constipation

Medical Definition

irregularity

noun

ir·​reg·​u·​lar·​i·​ty (ˌ)ir-ˌ(r)eg-yə-ˈlar-ət-ē 

plural irregularities

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

Legal Definition

irregularity

noun

ir·​reg·​u·​lar·​i·​ty ir-ˌre-gyə-ˈlar-ə-tē 

plural irregularities

: something that is irregular

an irregularity in the proceeding