The intellectual conception of a thing as it is in itself, not as it is known through perception.

synonym: thing-in-itself.

Roget 5: intrinsicality^†, inbeing^†, inherence, inhesion^†; subjectiveness; ego; egohood^†; essence, noumenon; essentialness^† etc. adj.; essential part, quintessence, incarnation, quiddity, gist, pith, marrow, core, sap, lifeblood, backbone, heart, soul; important part etc. (importance) 642.    principle, nature, constitution, character, type, quality, crasis^†, diathesis^†.    habit; temper, temperament; spirit, humor, grain; disposition.    endowment, capacity; capability etc. (power) 157.    moods, declensions, features, aspects; peculiarities etc. (speciality) 79; idiosyncrasy, oddity; idiocrasy etc. (tendency) 176; diagnostics.    ... show more

Polish: noumen, noumenon