[uh-ber-uhnt, ab-er-]
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  1. departing from the right, normal, or usual course.
  2. deviating from the ordinary, usual, or normal type; exceptional; abnormal.
  1. an aberrant person, thing, group, etc.

Origin of aberrant

First recorded in 1820–30, aberrant is from the Latin word aberrant- (stem of aberrāns, present participle of aberrāre to deviate). See ab-, errant
Related formsab·er·rance, ab·er·ran·cy, nounab·er·rant·ly, adverb
Can be confusedaberrant abhorrent

Synonyms for aberrant

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for aberrant


  1. deviating from the normal or usual type, as certain animals from the group in which they are classified
  2. behaving in an abnormal or untypical way
  3. deviating from truth, morality, etc
Derived Formsaberrance or aberrancy, noun

Word Origin for aberrant

rare before c19: from the present participle of Latin aberrāre to wander away
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 aberrant

1798, originally in natural history, from Latin aberrantem (nominative aberrans), present participle of aberrare "to wander away, go astray" (see aberration).

Online Etymology Dictionary, © 2010 Douglas Harper

aberrant in Medicine


[ă-bĕrənt, ăbər-]
  1. Deviating from the usual course, as certain ducts, vessels, or nerves.
  2. Deviating from the normal; untrue to type.
  3. Out of place; ectopic.
Related formsab•erran•cy n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.