ekˈ ̷ ̷ ̷ ̷ˌizəm, ik- noun
( -s )
1.
a. : externality 1a
b. : attention to externals ; especially : excessive preoccupation with externals
the externalism of some religions
2. : a doctrine dealing only with immediate experience and with objects of sense perception and discounting the validity of other knowledge : phenomenalism