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

Cepeda has challenged the results, citing irregularities at thousands of polling stations. — David Unsworth, FOXNews.com, 23 June 2026

And because this particular body part sits at the center of the face, even subtle irregularities are visible. — Victoria Oliva, Allure, 23 June 2026

The irregularities have been reported to the Miami-Dade State Attorney’s Office and Florida’s DBPR. — Linda Robertson june 23, Miami Herald, 23 June 2026

On Monday, a Milan court invalidated the will of Reggiani's mother, Silvana Barbieri, saying irregularities rendered the document legally void. — Anna Matranga, CBS News, 18 June 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