Definitions
1.NounA square- or crescent-shaped dumpling of unleavened dough, stuffed with sauerkraut, cheese, mashed potatoes, cabbage, onion, meat, or any combination of these, or with a fruit filling.
2.Noun↑ Mitchell Davis (2002), “Pierogi”, in The Mensch Chef or Why Delicious Jewish Food Isn’t an Oxymoron, New York, N.Y.: Clarkson Potter/Publishers, →ISBN, chapter 1 (Dinner Starts at Five: Appetizers and Salads), page 18: “Just in case you were wondering, pierogi is a Polish plural. Pierogis is grammatically incorrect. One is simply called a pierog.”