ab·​nor·​mal·​i·​ty | \ˌab-nər-ˈma-lə-tē, -(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

There are several blood vessel abnormalities that can exist from birth and predispose you to stroke, Dr. Stieg says. Carolyn L. Todd, SELF, "Montel Williams Describes His Life-Threatening Stroke: 'I Didn’t Think That I Was Going to Recover From This.'," 12 Oct. 2018 Chromosomal abnormalities reduce the likelihood of a successful pregnancy and can increase the risk of miscarriage or genetic disease. Jennifer Gerson, Marie Claire, "What Role Can Genetic Testing Play in IVF and Egg Freezing?," 1 Oct. 2018 Chances are that your bacon this morning came from pork fed with ractopamine, a beta-agonist that bulks up the pig but can adversely affect the human cardiovascular system and even cause chromosomal abnormalities. Eugenia Bone, WSJ, "‘The Poison Squad’ Review: Ever Wonder What’s In It?," 27 Sep. 2018 While the infection may present mild or no symptoms, Chagas can increase your risk of death by causing heart rhythm abnormalities — not good. Caroline Picard, Good Housekeeping, "QUIZ: Can You Identify These Dangerous Summer Plants and Bugs?," 3 Aug. 2018 In fact, according to the publication, the rare genetic abnormality can hinder the snake’s ability to catch prey. Madeline Farber, Fox News, "Virginia wildlife officials share 'extremely rare' photos of two-headed copperhead snake," 21 Sep. 2018 These would, in theory, read and decode brain signals in real-time with the help of machine learning and then deliver small electrical pulses to correct abnormalities associated with psychiatric conditions in an adaptive way. Daniela Hernandez, WSJ, "Brain Data Could Read Moods, Potentially Treat Depression," 10 Sep. 2018 About half of these losses are caused by chromosomal abnormalities, ACOG says. Korin Miller, SELF, "After Multiple Miscarriages, Pregnant Jana Kramer Reflects on Her Grief," 13 July 2018 Through no fault of Aram, the patient did not learn of the abnormality from her obstetrician, who had received the report the day it was issued, until weeks later. Dan Eaton, sandiegouniontribune.com, "Not every workplace complaint is legally protected whistleblowing," 25 June 2018

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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Last Updated

7 Dec 2018

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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 \
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- \
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).


to move with a clumsy heavy tread

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