Sprocket most often means a toothed wheel that drives a chain or perforated band, like on a bicycle or in machinery.

Core meaning (quick answer)

In everyday and technical use, sprocket is:

  • A wheel with teeth that mesh with a chain or perforated strip, transmitting motion and power.
  • Typical example: the toothed wheel your bike chain runs over at the back wheel.

Think of it as the “toothy wheel” that grabs a chain so something can turn smoothly.

Other meanings and contexts

Beyond the basic mechanical sense, sprocket can also mean:

  • Any one of the individual teeth on that toothed wheel.
  • A cylinder with teeth that pull film through a camera or projector.
  • In architecture, a flared extension at the base of a sloped roof (a specialist meaning).
  • A generic placeholder name for a product in economics/engineering examples, similar to “widget.”

Where you’ll see the word today

  • Cycling and bikes: Sprockets are a key part of the drivetrain, transferring power from pedals via the chain to the wheel.
  • Industrial machinery: Chain drives, conveyors, and many machines use sprockets to synchronize motion.
  • Film and cameras (older tech): Sprocket wheels keep film moving steadily past the lens.

If someone online asks “what does sprocket mean,” they’re almost always referring to that toothed wheel that works with a chain. TL;DR: A sprocket is a toothed wheel that meshes with a chain (like on a bike) to transmit motion; by extension it can also mean a single tooth, some roof details, or a generic “widget” in examples.

Information gathered from public forums or data available on the internet and portrayed here.