All to which the senses normally testify without room for critical reasoning is usually and properly said to be “experienced”; and all that is truly experienced is, in the epistemological sense, existent. [—]
In the metaphysical sense, existence is that mode of being which consists in the resultant genuine dyadic relation of a strict individual with all the other such individuals of the same universe.
http://www.commens.org/dictionary/entry/quote-fourth-curiosity-3