bogie

1. (Northern England) A low, hand-operated truck, generally with four wheels, used for transporting objects or for riding on as a toy; a trolley.Northern-England

2. (by extension, rail transport, also attributively) One of two sets of wheels under a locomotive or railcar; also, a structure with axles and wheels under a locomotive, railcar, or semi which provides support and reduces vibration for the vehicle.Examples: "1878. Bogie Trucks for Railway Locomotives, &c.: [...] Fig. 1 is a cross section and Fig. 2 a section plan of a bogie. A curved casting a is fixed to the engine and a wrought-iron beam or beams b are connected to the bogie frames by links c fitted with or without springs d."; "The soil all along this portion of the route is so elastic and the line so straight and level that the train goes humming along without jar or vibration, and the sensation in these cars, with their six-wheeled bogies and well arranged springs, is more like what one imagines flying to be than a mere matter-of-fact railway journey."; "An empty train was by mistake sent into the rear of an ordinary train standing at the station Rathausbrücke. The two colliding car-ends were damaged and the bogie of the standing train was lifted off the supporting rail so that its wheels settled by the side of the rail. Neither train fell, however, and nobody was seriously hurt."Synonyms: railroad truckalsoattributivebroadly

3. (aviation, by extension) A set of wheels attached to one of an aircraft's landing gear, or the structure connecting the wheels in one such set.Examples: "Although most A320s have two wheels on each of their main gear, a few built for the Indian market have four-wheel bogies, halving the amount of weight on each wheel and allowing the aircraft to use runways that couldn't withstand the ground pressure from a standard A320."broadly

4. (British, India, rail transport) A railway carriage.Examples: "The bogie coaches which he spoke of last year had been brought or were being brought into active service, but they had no further wagon stock available."; "Although we took our eight bogies along to Whitstable at 60 m.p.h., and made a clean start from there, after Herne Bay the engine primed badly on Blacksole Bank and nearly stopped before we got over the top. Then we ran like the wind across the marshes with half-regulator, 30 per cent cut-off, and the engine blowing off."; "Hard work is required from men and machines as I was to experience later when footplating Lambton No 5 on five bogies battling its way up Newtondale."BritishIndia

5. (dated) A soapbox racing vehicle.dated