From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
lass /lˈas/
[Sc.] Mädchen <neut>, Mädel <neut> [Bayr.] [Ös.] , Mädle <neut> [BW] , Madl <neut> [Tirol] , Meitli <neut> [Schw.] , Deern <neut> [Norddt.] , Dirndl <neut> [Bayr.] [Ös.]
Synonyms: girl, lassie, colleen, gal
see: girls, lasses, lassies, colleens, gals, girlie, girlie, country lass