Definitions for "Baal teshuvah"
in contemporary usage, one who has discovered his spiritual heritage and its responsibilities when already an adult
(lit. "master of return"): a person who turns to G-d in repentance, after willful or unknowing transgression of the Torah's commandments
( pl. baalei teshuvah): One who returns to G-d; a penitent who returns to the Torah way of life after having been astray.