From BiblePortal Wikipedia

Charles Buck Theological Dictionary [1]

Religious of St. a denomination given to divers communities of nuns, consisting generally of penitent courtezans; sometimes also called Magdalanettes. They were established at Mentz in 1542; at Paris in 1492; at Naples in 1324; at Rouen and Bordeaux in 1618. In each of these monasteries there were three kinds of persons and congregations; the first consisted of those who were admitted to make vows, and those bear the name of St. Magdalen; the congregation of St. Martha was the second, and was composed of those whom it was not thought proper to admit to vows finally; the congregation of St. Lazarus was composed of such as were detained by force. The religious of St. Magdalen at Rome were established by Pope Leo X. Clement VIII. settled a revenue on them; and farther appointed, that the effects of all public prostitutes dying interstate should fall to them; and that the testaments of the rest should be invalid, unless they bequeathed a portion of their effects, which was to be at least a fifth part of them.

Webster's Dictionary [2]

(n.) A reformed prostitute.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [3]

(or Magdalene) ( Μαγδαληνή , fem. adj. from Magdala ) , a surname regularly applied to one of the. Marys in the Gospels, derived from her place of nativity or former residence, in order to distinguish her from the other Marys ( Matthew 27:56;  Matthew 27:61;  Matthew 28:1;  Mark 15:40;  Mark 15:47;  Mark 16:1;  Mark 16:9;  Luke 8:2;  Luke 24:10;  John 19:25;  John 20:1;  John 20:18). (See Magdala).