[ sahy-kuh-loj-i-kuh l ]
/ ˌsaɪ kəˈlɒdʒ ɪ kəl /


of or relating to psychology.
pertaining to the mind or to mental phenomena as the subject matter of psychology.
of, pertaining to, dealing with, or affecting the mind, especially as a function of awareness, feeling, or motivation: psychological play; psychological effect.

Nearby words

  1. psychoimmunology,
  2. psychokinesis,
  3. psychol.,
  4. psycholepsy,
  5. psycholinguistics,
  6. psychological block,
  7. psychological moment,
  8. psychological novel,
  9. psychological operations,
  10. psychological primary

Sometimes psy·cho·log·ic.

Origin of psychological

First recorded in 1785–95; psycholog(y) + -ical

Related forms Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for psychological

British Dictionary definitions for psychological


/ (ˌsaɪkəˈlɒdʒɪkəl) /


of or relating to psychology
of or relating to the mind or mental activity
having no real or objective basis; arising in the mindhis backaches are all psychological
affecting the mind
Derived Formspsychologically, adverb

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 psychological



1680s; see psychology + -ical. Related: Psychologically. Psychological warfare recorded from 1940. Psychological moment was in vogue from 1871, from French moment psychologique "moment of immediate expectation of something about to happen."

The original German phrase, misinterpreted by the French & imported together with its false sense into English, meant the psychic factor, the mental effect, the influence exerted by a state of mind, & not a point of time at all, das Moment in German corresponding to our momentum, not our moment. [Fowler]
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for psychological


[ sī′kə-lŏjĭ-kəl ]


Of or relating to psychology.
Of, relating to, or arising from the mind or emotions.
Influencing or intended to influence the mind or emotions.

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