track

1. track Noun. (automotive) The distance between two opposite wheels on a same axletree (also track width)
distance
1. Noun. (countable) The amount of space between two points, usually geographical points, usually (but not necessarily) measured along a straight line.
2. Noun. (countable|informal) The difference; the subjective measure between two quantities.
3. Noun. (uncountable|figuratively) The entire amount of space to the objective.
4. Noun. (uncountable|figuratively) A considerable amount of space.
5. Verb. (transitive) To move away (from) someone or something.
6. Verb. (transitive) To leave at a distance; to outpace, leave behind.
wheel
1. Noun. A circular device capable of rotating on its axis, facilitating movement or transportation or performing labour in machines.
2. Noun. A wheel-like device used as an instrument of torture or punishment.
3. Noun. (informal|with "the") A steering wheel and its implied control of a vehicle.
4. Noun. (nautical) The instrument attached to the rudder by which a vessel is steered.
5. Noun. (slang) A person with a great deal of power or influence; a big wheel.
6. Noun. (poker slang) The lowest straight in poker: ace, 2, 3, 4, 5.
7. Noun. (automotive) wheel rim
8. Noun. a round portion of cheese
9. Verb. (intransitive|or|transitive) To roll along as on wheels.
10. Verb. (intransitive) To travel around in large circles, particularly in the air.
11. Verb. (transitive) To transport something or someone using any wheeled mechanism, such as a wheelchair.
12. Verb. (transitive) To put into a rotatory motion; to cause to turn or revolve; to make or perform in a circle.
axletree
1. Noun. A bar or beam of wood or iron, connecting the opposite wheels of a carriage, on the ends of which the wheels revolve.
2. Noun. A spindle or axle of a wheel.
2. track Noun. (automotive) Short for caterpillar track.
caterpillar track
1. Noun. A continuous track in the form of a steel or rubber belt fitted instead of wheels to crawlers, bulldozers, tanks and similar off-road vehicles.