Truss  —n. 1 framework supporting a roof, bridge, etc. 2 surgical appliance worn to support a hernia. 3 bundle of hay or straw. 4 compact terminal cluster of flowers or fruit. —v. 1 tie up (a fowl) for cooking. 2 (often foll. By up) tie (a person) up with the arms to the sides. 3 support (a roof or bridge etc.) With a truss or trusses. [french]