Also see definition of "Mistress" in Word Study
Mistress
MISTRESS [isbe]
MISTRESS - mis'-tres (ba`alah, gebhereth): Is the translation of ba`alah, "lady," "owner" (1 Ki 17:17; Nah 3:4); in 1 Sam 28:7, "a woman that hath a familiar spirit" is literally, "the mistress of a familiar spirit"; of gebhereth (Gen 16:4,8,9; 2 Ki 5:3; Ps 123:2; Prov 30:23; Isa 24:2); in Isa 47:5,7, we have the King James Version and the English Revised Version "lady," the American Standard Revised Version "mistress."
Also see definition of "Mistress" in Word Study