# noumenon

> English word · Noun · IPA /ˈnuːmənɒn/

## Definitions
1. A thing as it is independent of any conceptualization or perception by the human mind, postulated by practical reason but existing in a condition which is in principle unknowable and unexperienceable.

## Etymology
From German Noumenon, from Ancient Greek νοούμενον (nooúmenon, “thing that is known”), passive present participle of νοέω (noéō, “I know”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/noumenon