Pronunciation: (nOO'mu-non"), [key]
—pl. -naPronunciation: (-nu). [key]
1. the object, itself inaccessible to experience, to which a phenomenon is referred for the basis or cause of its sense content.
2. a thing in itself, as distinguished from a phenomenon or thing as it appears.
3. Kantianism.something that can be the object only of a purely intellectual, nonsensuous intuition.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.