The Collaborative International Dictionary of English v.0.48:

Proselyte \Pros"e*lyte\, n. [OE. proselite, OF. proselite, F.
   proselytus, Gr. ?, adj., that has come, n., a new comer,
   especially, one who has come over from heathenism to the
   Jewish religion; ? toward, to + (prob.) the root of ? to
   come.]
   A new convert especially a convert to some religion or
   religious sect, or to some particular opinion, system, or
   party; thus, a Gentile converted to Judaism, or a pagan
   converted to Christianity, is a proselyte.
   [1913 Webster]

         Ye [Scribes and Pharisees] compass sea and land to make
         one proselyte.                           --Matt. xxiii.
                                                  15.
   [1913 Webster]

         Fresh confidence the speculatist takes
         From every harebrained proselyte he makes. --Cowper.
   [1913 Webster]

   Syn: See Convert.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Proselyte \Pros"e*lyte\, v. t. [imp. & p. p. Proselyted; p.
   pr. & vb. n. Proselyting.]
   To convert to some religion, opinion, or system; to bring
   over. --Dr. H. More.
   [1913 Webster]

WordNet (r) 3.0 (2006):

proselyte
    n 1: a new convert; especially a gentile converted to Judaism