[ dee-ree-iz-uh m, dey-rey- ]
/ diˈri ɪz əm, deɪˈreɪ- /

noun Psychology.

Origin of dereism

< Latin dē rē, literally, away from the matter + -ism

Related forms

de·re·is·tic, adjectivede·re·is·ti·cal·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for dereism


[ dē-rēĭz′əm, dērē- ]


Mental activity that is absorbed in fantasy, lacking any connection to the external world or reality.

Related forms

de′re•istic adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.