n.1. A four-wheeled, usually horse-drawn vehicle with a large rectangular body, used for transporting loads.
2. a. A light automotive transport or delivery vehicle.
b. A station wagon.
c. A police patrol wagon.
3. A child's low, four-wheeled cart hauled by a long handle that governs the direction of the front wheels.
4. A small table or tray on wheels used for serving drinks or food: a dessert wagon.
5. Wagon The Big Dipper
6. Chiefly British An open railway freight car.
off the wagon Slang 1. No longer abstaining from alcoholic beverages.
2. No longer persevering with some other program requiring self-discipline, such as losing weight or quitting smoking.
on the wagon Slang 1. Abstaining from alcoholic beverages.
2. Persevering with some other program requiring self-discipline, such as losing weight or quitting smoking.