ab·​nor·​mal·​i·​ty | \ ˌab-nər-ˈma-lə-tē How to pronounce abnormality (audio) , -(ˌ)nȯr-\
plural abnormalities

Definition of abnormality

1 : something abnormal
2 : the quality or state of being abnormal

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Synonyms & Antonyms for abnormality


anomaly, freak, monster, monstrosity


average, norm, normal, par, standard

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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

People with obesity and diabetes also tend to have high triglycerides, a sign of poor metabolic health, a measure of factors such as blood sugar and blood pressure, and other metabolic abnormalities that are damaging to the heart and blood vessels. Betsy Mckay, WSJ, "Heart Attack at 49—America’s Biggest Killer Makes a Deadly Comeback," 21 June 2019 Researchers generally use fetal tissue from elective abortions rather than miscarriages because miscarriages often result from chromosomal or other developmental abnormalities that could make the tissue unsuitable for research. Michelle Andrews, Scientific American, "FAQ: How Does New Trump Fetal Policy Impact Medical Research?," 7 June 2019 Her death certificate mentions pulmonary edema and cardiac abnormalities. Elizabeth Llorente, Fox News, "Dominican Republic resort deaths mystery: timeline," 25 May 2019 This included examining 750 mothers' and 891 fathers' exposure to 16 workplace chemicals or other substances linked to neurological and/or congenital abnormalities from three months before pregnancy through to the birth of the child. chicagotribune.com, "Women’s exposure to solvents at work tied to autism in children," 2 July 2019 The delay, however, raises the risk that an embryo has genetic abnormalities that could result in a miscarriage or a disorder like Down syndrome. Daniela Hernandez, WSJ, "New Noninvasive Genetic Tests for IVF Embryos Are in Development," 24 June 2019 Often, there are heads in his pieces, but their craniums open up to reveal fantastical worlds, everything from anatomical abnormalities to robotic inner-workings. Ray Mark Rinaldi, The Know, "One of Mexico City’s trendsetters is bringing his art and music to Denver," 16 June 2019 Palace officials said doctors on Saturday found Michiko has heart valve abnormalities and an irregular pulse after regular health checks last week showed an increase in cardiac hormones. Fox News, "Japan's former empress has heart problem but fine to travel," 11 June 2019 Multiple ocular colobomas are relatively common in snow leopards and can cause abnormalities to parts of the eye including the eyelids, iris and optic nerves, according to the zoo. Robin Goist, cleveland.com, "Snow leopard cub born at Akron Zoo," 5 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'abnormality.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of abnormality

1847, in the meaning defined at sense 1

History and Etymology for abnormality

abnormal entry 1 + -ity

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Statistics for abnormality

Last Updated

20 Jul 2019

Look-up Popularity

Time Traveler for abnormality

The first known use of abnormality was in 1847

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More Definitions for abnormality



English Language Learners Definition of abnormality

: something that is not usual, expected, or normal : something that is abnormal


ab·​nor·​mal·​i·​ty | \ ˌab-nər-ˈma-lə-tē How to pronounce abnormality (audio) \
plural abnormalities

Kids Definition of abnormality

: something that is not usual, expected, or normal The X-ray showed no abnormalities.


ab·​nor·​mal·​i·​ty | \ ˌab-nər-ˈmal-ət-ē, -(ˌ)nȯr- How to pronounce abnormality (audio) \
plural abnormalities

Medical Definition of abnormality

1 : the quality or state of being abnormal
2 : something abnormal brain-wave abnormalities

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Comments on abnormality

What made you want to look up abnormality? Please tell us where you read or heard it (including the quote, if possible).


an act or instance of editing or removing

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