The Collaborative International Dictionary of English v.0.48:
Vol-au-vent \Vol`-au`-vent"\, n. [F.] (Cookery) A light puff paste, with a raised border, filled, after baking, usually with a ragout of fowl, game, or fish. [1913 Webster]WordNet (r) 3.0 (2006):
vol-au-vent n 1: puff paste shell filled with a savory meat mixture usually with a sauce