externality Meaning, Definition & Usage

  1. noun the quality or state of being outside or directed toward or relating to the outside or exterior
    outwardness.
    • the outwardness of the world

WordNet

Ex`ter*nal"i*ty noun
Definitions
  1. State of being external; exteriority; (Metaph.) separation from the perceiving mind.
    Pressure or resistance necessarily supposes externality in the thing which presses or resists. A. Smith.

Webster 1913