[in-ter-ak-shuh-niz-uh m]

noun Philosophy.

a theory that the mind and the body may each affect the other.

Origin of interactionism

First recorded in 1900–05; interaction + -ism
Related formsin·ter·ac·tion·ist, noun, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for interactionism



philosophy the dualistic doctrine that holds that mind and body have a causal effect upon one another, as when pricking one's finger (physical) causes pain (mental), or an embarrassing memory (mental) causes one to blush (physical)Compare parallelism (def. 3)
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