The Collaborative International Dictionary of English v.0.48:
Eremitism \Er"e*mit*ism\, n. The state of a hermit; a living in seclusion from social life. [1913 Webster]WordNet (r) 3.0 (2006):
eremitism n 1: monasticism characterized by solitude in which the social dimension of life is sacrificed to the primacy of religious experience