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abnormal psychology

American  

noun

  1. the branch of psychology that deals with modes of behavior, mental phenomena, etc., that deviate markedly from the standards believed to characterize a well-adjusted personality.

abnormal psychology British  

noun

  1. the study of behaviour patterns that diverge widely from generally accepted norms, esp those of a pathological nature

"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

Etymology

Origin of abnormal psychology

First recorded in 1900–05

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.