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{{Top}}inconscient]]'', [[German]]: ''[[Unbewußte{{Bottom}}

While the notion of a [[unconscious|non-conscious]] part of the [[mind]] or [[psyche]] has a long history in both [[philosophy]] and the [[psychology|psychological]] [[science|sciences]], [[Sigmund Freud]] is often credited with the discovery of the [[unconscious]].

Although the term "[[unconscious]]" had been used by writers prior to [[Freud]], it acquires a completely original meaning in his work, in which it constitutes the single most important concept.

=====Noun=====

As a ''noun'', the ''noun-form'' designates one of the ''psychical systems'', refers to the [[unconscious|unconscious]] system, described by [[Freud]]'s, which [[Freud]] described in his, first theory of [[psyche|mental]] [[structure]] (the "[[topographical model]]"), first [[topography]] of the [[psyche]].