Thayer's Greek Lexicon

 1. a newcomer
  1) a stranger, alien
2. a proselyte
  1) one who has come over from a Gentile religion to Judaism

The Rabbis distinguished two classes of proselytes, proselytes of
righteousness, who received circumcision and bound themselves to keep
the whole of the Mosaic law and to comply with all the requirements
of Judaism, and proselytes of the gate, who dwelt among the Jews, and
although uncircumcised observed certain specific laws, esp. the
seven precepts of Noah, i.e. against the seven chief sins, idolatry,
blasphemy against God, homicide, unchastity, theft or plundering,
rebellion against rulers and the use of "flesh with the blood thereof".