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

There have also been reports that mice carrying a mix of mitochondrial DNA from two animals had behavioral, cognitive, and other abnormalities. — Megan Molteni, STAT, 3 Nov. 2026

Doctors have long relied primarily on transvaginal ultrasounds to examine the thickness of the uterine lining for abnormalities, as well as on endometrial tissue biopsies to determine whether cancer or precancerous changes are present. — Margaret Hetherman, Washington Post, 30 Oct. 2026

Pregnancy loss can stem from chromosomal or structural abnormalities, such as a uterine septum, fibroids or scar tissue. — Katherine Pukinskis, The Conversation, 26 Oct. 2026

The virus may also cause congenital abnormalities in newborn calves. — Deidre McPhillips, CNN Money, 23 Oct. 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