noun
A mechanical part that converts rotational motion to linear motion, or vice versa.
エンジンのクランクが回転している。
The engine's crank is rotating.
noun
crank-shaped road (driving school)
A narrow, crank-shaped course used in driving school training to practice tight turns.
Be careful not to go off the track on the crank course at the driving school.
noun
A hand crank used on early movie cameras to manually advance the film.
昔の映画カメラはクランクを手で回してフィルムを送っていた。
Old movie cameras advanced the film by turning a crank by hand.