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

• 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

Your doctor may also run tests to look for an underlying condition like PCOS, a thyroid abnormality, or endometriosis that may need to be treated or managed with, potentially, medications or surgery. —Julia Ries, SELF, 23 June 2025

The chemical compound has been linked to fetal abnormalities, low birth weight, and brain and behavior disorders in infants and children, as well as diabetes, heart disease, cancer and obesity in adults. —Sandee Lamotte, CNN Money, 18 June 2025

Theories include: Metaplasia: The leading theory among endometriosis surgeons is that abnormalities during fetal development lead to specific cells turning into endometriosis. —Sarah Bence, Verywell Health, 18 June 2025

While the exact cause isn’t fully understood, factors like blood vessel abnormalities, skin barrier dysfunction and inflammation can contribute to these breakouts. —Lauryn Higgins, Flow Space, 12 June 2025

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