In painting, the attempt to make images that seemingly share or extend the three-dimensional space in which the spectator stands. The term is also applied in sculpture, for a presentation of figures that attempts in some way to make them seem alive, and occasionally in architecture, for a presentation of structures that attempts in some way to enhance their dimensions. It was coined by Franz Wickhoff in 1895 and has been used by modernist writers to characterize all methodical attempts to represent, or ‘give the illusion of’, the visible world. But in current usage it generally denotes work where the intention is that something should seem not so much represented as substantially present.
From Grove Art Online
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