Another Derrida-inspired puncept of a floating (or free-falling) signifier:
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"From then on it was probably necessary to begin to think that there was no center, that the center could not be thought in the form of a being-present, that the center had no natural locus, that it was not a fixed locus but a function, a sort of non-locus in which an infinite number of sign-substitutions came into play. This moment was that in which language invaded the universal problematic; that in which, in the absence of a center or origin, everything became discourse--provided we can agree on this word--that is to say, when everything became a system where the central signified, the original or transcendental signified, is never absolutely present outside a system of differences. The absence of the transcendental signified extends the domain and the interplay of signification ad infinitum." Jacques Derrida, Structure, Sign, and Play in the Discourse of the Human Sciences