noun (often used pejoratively)
emphasis upon psychological factors in the development of a theory, as in history or philosophy.
a term or concept of psychology or psychoanalysis, especially when used in ordinary conversation or a nontechnical context.
Origin of psychologism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the belief in the importance and relevance of psychology for other sciences
the belief that psychology is the basis for all other natural and social sciences
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