Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The science that deals with mental processes and behavior.
  • n. The emotional and behavioral characteristics of an individual, group, or activity: the psychology of war.
  • n. Subtle tactical action or argument used to manipulate or influence another: He used poor psychology on his employer when trying to make the point.
  • n. Philosophy The branch of metaphysics that studies the soul, the mind, and the relationship of life and mind to the functions of the body.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The study of the human mind.
  • n. The study of human behavior.
  • n. The study of animal behavior.
  • n. The mental, emotional, and behavioral characteristics pertaining to a specified person, group, or activity.

from the GNU version of the Collaborative International Dictionary of English

  • n. The science of the human soul; specifically, the systematic or scientific knowledge of the powers and functions of the human soul, so far as they are known by consciousness; a treatise on the human soul.

from The Century Dictionary and Cyclopedia

  • n. The science of the phenomena of mind; mental science.
  • n. The special psychology of any single group of living things: a common term for folk psychology, professional psychology, race psychology, ethnic psychology, psychology of peoples, etc.
  • n. The science of the products of the mental life in the human race at large; same as folk psychology .
  • n. The psychology and psychogenesis of the human mind.
  • n. Race psychology; the differential psychology of species and races, whether human or sub-human.
  • n. The science of the individual mind as conditioned, in its functions and development, by other minds; the psychology of the social factor in its influence upon the individual mind.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the science of mental life

Etymologies

From French psychologie, from Latin psychologia, from Ancient Greek ψυχή (psukhē, "soul") + -logia ("study of"). (Wiktionary)

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