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abnormality

[ab-nawr-mal-i-tee]
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noun, plural ab·nor·mal·i·ties.
  1. an abnormal condition, state, or quality; irregularity; deviation.
  2. an abnormal thing or event.
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Origin of abnormality

First recorded in 1850–55; abnormal + -ity

Synonyms

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anomaly, aberration, peculiarity, oddity, idiosyncrasy.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for abnormality

abnormality

noun plural -ties
  1. an abnormal feature, event, etc
  2. a physical malformation; deformity
  3. deviation from the typical or usual; irregularity
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for abnormality

n.

"quality of being abnormal," 1854; "abnormal feature or quality," 1859, from abnormal + -ity. Earlier as abnormity (1731).

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Online Etymology Dictionary, © 2010 Douglas Harper

abnormality in Medicine

abnormality

(ăb′nôr-mălĭ-tē)
n.
  1. An anomaly, malformation, or difference from the normal.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.