Meaning

noun a new convert; especially a gentile converted to Judaism

originFrom Old French proselite, from Late Latin proselytus (“proselyte, alien resident”), from Ancient Greek προσήλυτος (prosḗlutos, “newcomer, convert”) (from πρός (prós, “to, towards”) and the stem -ηλυ- of ἐλήλυθα (elḗlutha), perfect of ἔρχομαι (érkhomai, “come”)), translation of Hebrew גר (ger) in the Septuagint translation of the Torah (e.g., Exodus 12:49); also used in Matthew 23:15, Acts 2:10,…

Etymology from Wiktionary, CC BY-SA 3.0