= a theory of knowledge which holds that meaning is enacted through the participation of the human mind with the world 
From the Wikipedia:
"A participatory epistemology is a theory of knowledge which holds that meaning is enacted through the participation of the human mind with the world. Originally proposed by Goethe, it has been discussed extensively by cultural historian Richard Tarnas.
In a participatory epistemology, meaning is neither solely objective nor solely subjective. That is to say that meaning is not, per modern or positivist views, found solely outside of the human mind, in the objective world, waiting to be discovered. Nor, per postmodern or constructivist views, is meaning simply constructed or projected onto an inherently meaningless world by the subjective human mind. Rather, Tarnas argues that meaning is enacted through the dialectical participation of the human mind with the larger meaning of the cosmos. Thus meaning exists in potentia in the cosmos, but must be articulated by human consciousness before it exists in actuality." (http://en.wikipedia.org/wiki/Participatory_theory)