differAnce

Différance is a French homophonous with the word "différence," used in the context of deconstruction. The French word différer simultaneously means "to defer or postpone" and "to differ." In his essay of the same name, Jacques Derrida, indicates that différance gestures at a number of heterogeneous features which govern the production of textual meaning. The first (relating to the deferral) is the notion that words and signs can never fully summon forth what they mean, but can only be defined through appeal to additional words, from which they differ. Thus, meaning is forever "deferred" or postponed through an endless chain of signifiers. The second (relating to difference, sometimes referred to as espacement or "spacing") concerns the force which differentiates elements from one another and, in so doing, engenders binary oppositions and hierarchies which underpin meaning itself.
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This is a term coined by Jacques Derrida , father deconstructionism.  (However, Derrida  does not capitalize the "A".)  Derrida explains "differance" as that which is different and deferred (put out of mind).  It's a philosophical term that causes many people headaches and Derrida does not explain it in an introductory way.  However, in many contexts, you will have a rough understanding of what is said if you think of the differAnce as the shadows of our understanding, something we know but forget and need to be reminded.  Or, you might think of it as the cultural Unconscious, something that the whole culture puts mostly out of mind. Click here for on differAnce.   Arguably, the differAnce is a source of our creativity.  Mostly we forget it, but sometimes people think of these largely unconscious aspects of life and weave them creatively into new moments of understanding.