ˈnüməˌnän, ˈnau̇m- noun
( plural noume·na -_nə)
Etymology: German, from Greek nooumenon that which is conceived, thought, from neuter of present passive participle of noein to conceive, think, from nous mind
1. Kantianism
a. : an object that is conceived by reason and consequently thinkable but is not knowable by the senses : thing-in-itself
b. : an unknowable object (as God or the soul) whose existence is theoretically problematic
2. : an object of purely rational apprehension as opposed to an object of perception