From WordNet (r) 3.0 (2006) [wn]:
devotee
n 1: an ardent follower and admirer [syn: fan, buff,
devotee, lover]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Devotee \Dev`o*tee"\, n.
One who is wholly devoted; esp., one given wholly to
religion; one who is superstitiously given to religious
duties and ceremonies; a bigot.
[1913 Webster]
While Father Le Blanc was very devout he was not a
devotee. --A. S. Hardy.
[1913 Webster]