abnormality

noun

ab·​nor·​mal·​i·​ty ˌab-nər-ˈma-lə-tē 

-(ˌ)nȯr-

plural abnormalities

1

: something abnormal

2

: the quality or state of being abnormal

Synonyms of abnormality

• anomaly
• mutation

Examples of abnormality in a Sentence

The test results showed several genetic abnormalities.

There was some abnormality in his vision.

Recent Examples on the Web

More recently, Hoeg was involved in the agency’s review of a formal petition to add bold new warnings to antidepressant drugs about unproven pregnancy risks, including fetal abnormalities that could lead to autism and other disorders. —Matthew Perrone, Fortune, 16 May 2026

According to the National Institutes of Health's Genetic and Rare Diseases Information Center, Schwartz-Jampel syndrome is a condition where the muscles permanently stiffen and a person has bone abnormalities called chondrodysplasia, both of which can worsen over time. —ABC News, 12 May 2026

As part of that effort, the railroad has installed inspection portals that scan the trains and take pictures to help spot any abnormalities that would suggest contraband or immigrants aboard the train. —CBS News, 11 May 2026

Symptoms include hearing loss, physical abnormalities, poor muscle tone, seizures. —Susan Young, PEOPLE, 10 May 2026

Word History

Etymology

abnormal entry 1 + -ity

First Known Use

1847, in the meaning defined at sense 1

Rhymes for abnormality

• cardinality
• commonality
• communality
• cordiality
• corporeality
• criminality
• criticality
• functionality
• generality
• geniality
• hospitality
• illegality

Kids Definition

abnormality

noun

ab·​nor·​mal·​i·​ty ˌab-nər-ˈmal-ət-ē 

-(ˌ)nȯr-

plural abnormalities

1

: the state of being abnormal

2

: something abnormal

Medical Definition

abnormality

noun

ab·​nor·​mal·​i·​ty ˌab-nər-ˈmal-ət-ē, -(ˌ)nȯr- 

plural abnormalities

1

: the quality or state of being abnormal

2

: something abnormal

brain-wave abnormalities