Meaning & Definition of word "Pulley"

noun:

• 1. A wheel on an axle or shaft designed to support movement and change of direction of force using a rope or cable.
  • Example: The workers used a pulley to lift the heavy crates onto the truck.
• 2. A system of such wheels used in conjunction to lift loads more efficiently.
  • Example: The construction site utilized a complex pulley system to hoist materials to the upper floors.
• 3. A simple machine consisting of a wheel with a groove for a rope or cable, often used to alter the direction of a force.
  • Example: She pulled the rope attached to the pulley to raise the flag.
• 4. A block or series of blocks used to make raising heavy objects easier.
  • Example: They set up a pulley to help pull the boat onto the trailer.