===Lead=== 
 I reworked the definition to mean what it means in a common dictionary or legal text.  We can't synthesize our own complicated, nuanced, or novel formulations (even if they are useful). 

 ===Problems with sources=== 
 The reason this article reads like an essay, is that it primarily relies on philosophical primary texts.  These may be authoritative and seminal, but we should be using secondary articles which describe and summarize the points made in these texts.  The only place "Being and Nothingness" should be used is in a quotation box, and it's significance should be supported by a secondary RS.  In this context, no primary philosophical source should be used, except to augment a secondary source.  Boring, yes.  Distant from the original works, yes.  How encyclopedias necessarily function, yes.  One caveat is that occasionally primary sources are secondary sources for material contained therein.  For example, if Satre wrote a comprehensive history of an idea dating back to Aristotle, then maybe that info could be sourced directly.  Still, given how old many of these great texts are, we should be able to find more current cites for anything like that.