Allusion
This is a key concept I am busy exploring through different interactive installations, and now in the *scenography* of exhibitions.
In rhetoric, an allusion is the implicit referencing of a related object or circumstance, which has occurred or existed in an external context. An allusion is understandable only to those with prior knowledge of the reference in question (as the writer assumes the reader has).
Note: “allusion” should not be confused with an illusion.
a definition from wikipedia