keyway








noun

  1. Machinery. a groove in a shaft, the hub of a wheel, etc., for receiving part of a key holding it to another part.
  2. a slot in a lock for receiving and guiding the key.
  3. (in poured-concrete construction) a longitudinal groove in a footing, or in a pour that has set, providing a key for newly poured concrete.
  4. a depression or slot carved into rock to provide a bond or anchorage for a structure, as a dam.

noun

  1. a longitudinal slot cut into a component to accept a key that engages with a similar slot on a mating component to prevent relative motion of the two components
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