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

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "proselyte":
   Christian, God-fearing man, accepter, apostate, apostle,
   backslider, believer, bolter, catechumen, churchgoer, churchite,
   churchman, collaborationist, collaborator, communicant, convert,
   daily communicant, defector, deserter, devotee, devotionalist,
   disciple, fanatic, fifth columnist, follower, good Christian,
   mugwump, neophyte, pietist, quisling, receiver, recidivist,
   recreant, religionist, renegade, renegado, renegate, reversionist,
   runagate, saint, schismatic, seceder, secessionist, separatist,
   strikebreaker, tergiversant, tergiversator, theist, traitor,
   truster, turnabout, turncoat, turntail, votary, zealot



Easton's 1897 Bible Dictionary:

Proselyte
   is used in the LXX. for "stranger" (1 Chr. 22:2), i.e., a comer
   to Palestine; a sojourner in the land (Ex. 12:48; 20:10; 22:21),
   and in the New Testament for a convert to Judaism. There were
   such converts from early times (Isa. 56:3; Neh. 10:28; Esther
   8:17). The law of Moses made specific regulations regarding the
   admission into the Jewish church of such as were not born
   Israelites (Ex. 20:10; 23:12; 12:19, 48; Deut. 5:14; 16:11, 14,
   etc.). The Kenites, the Gibeonites, the Cherethites, and the
   Pelethites were thus admitted to the privileges of Israelites.
   Thus also we hear of individual proselytes who rose to positions
   of prominence in Israel, as of Doeg the Edomite, Uriah the
   Hittite, Araunah the Jebusite, Zelek the Ammonite, Ithmah and
   Ebedmelech the Ethiopians.

     In the time of Solomon there were one hundred and fifty-three
   thousand six hundred strangers in the land of Israel (1 Chr.
   22:2; 2 Chr. 2:17, 18). And the prophets speak of the time as
   coming when the strangers shall share in all the privileges of
   Israel (Ezek. 47:22; Isa. 2:2; 11:10; 56:3-6; Micah 4:1).
   Accordingly, in New Testament times, we read of proselytes in
   the synagogues, (Acts 10:2, 7; 13:42, 43, 50; 17:4; 18:7; Luke
   7:5). The "religious proselytes" here spoken of were proselytes
   of righteousness, as distinguished from proselytes of the gate.

     The distinction between "proselytes of the gate" (Ex. 20:10)
   and "proselytes of righteousness" originated only with the
   rabbis. According to them, the "proselytes of the gate" (half
   proselytes) were not required to be circumcised nor to comply
   with the Mosaic ceremonial law. They were bound only to conform
   to the so-called seven precepts of Noah, viz., to abstain from
   idolatry, blasphemy, bloodshed, uncleaness, the eating of blood,
   theft, and to yield obedience to the authorities. Besides these
   laws, however, they were required to abstain from work on the
   Sabbath, and to refrain from the use of leavened bread during
   the time of the Passover.

     The "proselytes of righteousness", religious or devout
   proselytes (Acts 13:43), were bound to all the doctrines and
   precepts of the Jewish economy, and were members of the
   synagogue in full communion.

     The name "proselyte" occurs in the New Testament only in Matt.
   23:15; Acts 2:10; 6:5; 13:43. The name by which they are
   commonly designated is that of "devout men," or men "fearing
   God" or "worshipping God."