Meaning of epiphenomenalism

ep•i•phe•nom•e•nal•ism

Pronunciation: (ep"u-fu-nom'u-nl-iz"um), [key]
— n.
  1. the doctrine that consciousness is merely an epiphenomenon of physiological processes, and that it has no power to affect these processes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.