beef Wellington noun1 •A fillet of beef tenderloin steak coated with pâté de foie gras and a duxelles of mushrooms, wrapped in puff pastry and baked.The charges against Ms. Patterson stemmed from a lunch party nearly two years ago in the rural town of Leongatha, at which she cooked and served beef Wellington. — 2025 formsbeef Wellingtons · beef wellingtons