a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
"The construction worker used a pulley to lift the heavy beam up to the second floor by pulling down on the attached rope."
One of the simple machines; a sheave, a wheel with a grooved rim, in which a pulled rope or chain lifts an object (more useful when two or more pulleys are used together, as in a block and tackle arrangement, such that a small force moving through a greater distance can exert a larger force through a smaller distance).
"The mechanic adjusted the grooved rim of the heavy-duty pulley to ensure the crane could lift the engine with less effort."
To raise or lift by means of a pulley.
"The mechanic used a pulley to hoist the heavy engine block up into the car's frame."
A surname.
"My neighbor, Mr. Pulley, insisted on fixing his own fence instead of calling a professional."