EXTERNALITY
outwardness, externality
(noun) the quality or state of being outside or directed toward or relating to the outside or exterior; “the outwardness of the world”
Source: WordNet® 3.1
Etymology
Noun
externality (countable and uncountable, plural externalities)
(uncountable) The state of being external or externalized.
(countable) A thing that is external relative to something else.
(economics, countable) An impact, positive or negative, on any party not involved in a given economic transaction or act.
Source: Wiktionary
Ex`ter*nal"i*ty, n.
Definition: State of being external; exteriority; (Metaph.)
Definition: separation from the perceiving mind.
Pressure or resistance necessarily supposes externality in the thing
which presses or resists. A. Smith.
Source: Webster’s Unabridged Dictionary 1913 Edition