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Definition of psychology - 6 dictionary results

psy⋅chol⋅o⋅gy

[sahy-kol-uh-jee]
–noun, plural -gies.
1. the science of the mind or of mental states and processes.
2. the science of human and animal behavior.
3. the sum or characteristics of the mental states and processes of a person or class of persons, or of the mental states and processes involved in a field of activity: the psychology of a soldier; the psychology of politics.
4. mental ploys or strategy: He used psychology on his parents to get a larger allowance.

Origin:
1675–85; < NL psȳchologia. See psycho-, -logy
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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psy·chol·o·gy   (sī-kŏl'ə-jē)   
n.   pl. psy·chol·o·gies
  1. The science that deals with mental processes and behavior.

  2. The emotional and behavioral characteristics of an individual, group, or activity: the psychology of war.

  3. Subtle tactical action or argument used to manipulate or influence another: He used poor psychology on his employer when trying to make the point.

  4. Philosophy The branch of metaphysics that studies the soul, the mind, and the relationship of life and mind to the functions of the body.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Cultural Dictionary

psychology

The science dealing with mental phenomena and processes. Psychologists study emotions, perception, intelligence, consciousness, and the relationship between these phenomena and processes and the work of the glands and muscles. Psychologists are also interested in diseased or disordered mental states, and some psychologists provide therapy for individuals. In the United States, however, psychologists, unlike psychiatrists, are not medical doctors. (See psychiatry.)

Note: The two main divisions of psychology are individual or personality psychology and social psychology; social psychology deals with the mental processes of groups.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

psychology 
1653, "study of the soul," probably coined mid-16c. in Germany by Melanchthon as Mod.L. psychologia, from Gk. psykhe- "breath, spirit, soul" (see psyche) + logia "study of." Meaning "study of the mind" first recorded 1748, from G. Wolff's Psychologia empirica (1732); main modern behavioral sense is from 1895.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: psy·chol·o·gy
Pronunciation: -jE
Function: noun
Inflected Form: plural -gies
1 : the science ofmind and behavior
2 a : the mental or behavioral characteristics typical of an individual or group or a particular form of behavior psychology> psychology of arson> b : the study of mind and behavior in relation to a particular field of knowledge or activity psychology> psychologyof learning>
3 : a treatise on or a school, system, or branch of psychology
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

psychology psy·chol·o·gy (sī-kŏl'ə-jē)
n.

  1. The science that deals with mental processes and behavior.

  2. The emotional and behavioral characteristics of an individual, a group, or an activity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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