Meaning

noun a full skirt with a gathered waistband

noun a dress with a tight bodice and full skirt

originBorrowed from German Dirndl, a diminutive of Dirne (“girl”) (Austria, Bavaria), from Middle High German dierne (“girl; servant”), from Old High German diorna, thiorna (“girl; servant”), from Proto-West Germanic *þewernā (“maiden, young girl; female servant, handmaid”), ultimately from Proto-Indo-European *tekʷ- (“to flow; to run”).

Etymology from Wiktionary, CC BY-SA 3.0