1) Beef dish 2) Dish made with sour cream 
A dish of thinly sliced beef (usually tenderloin or top loin), onions, and mushrooms sautéed in a combination of butter and sour-cream sauce. Often served with a rice pilaf. Invented by Count Paul Stroganoff in the 19th century. 
a dish of meat sautéed with onion and cooked in a sauce of sour cream, seasonings, and, usually, mushrooms: beef stroganoff.