The Collaborative International Dictionary of English v.0.48:

Experiential \Ex*pe`ri*en"tial\ ([e^]ks*p[=e]`r[i^]*[e^]n"shal),
   a.
   Derived from, or pertaining to, experience. --Coleridge.
   [1913 Webster]

         It is called empirical or experiential . . . because it
         is given to us by experience or observation, and not
         obtained as the result of inference or reasoning.
                                                  --Sir. W.
                                                  Hamilton.
   -- Ex*pe`ri*en"tial*ly, adv. --Dr. H. More.
   [1913 Webster]

WordNet (r) 3.0 (2006):

experiential
    adj 1: relating to or resulting from experience; "a personal,
           experiential reality"
    2: derived from experience or the experience of existence; "the
       rich experiential content of the teachings of the older
       philosophers"- Benjamin Farrington; "formal logicians are not
       concerned with existential matters"- John Dewey [syn:
       experiential, existential]