The Collaborative International Dictionary
Outness
Outness \Out"ness\, n.
The state of being out or beyond; separateness.
-
(Metaph.) The state or quality of being distinguishable from the perceiving mind, by being in space, and possessing material quality; externality; objectivity.
The outness of the objects of sense.
--Sir W. Hamilton.
Douglas Harper's Etymology Dictionary
outness
1709, from out (adv.) + -ness.
Wiktionary
outness
Etymology 1 n. (context philosophy English) The collective of things that are distinct from the observer. Etymology 2
n. The extent to which someone, particularly a lesbian, is open about her sexuality.