Definition, Meaning & Synonyms

pinion

noun
/ˈpɪn.jən/
Definition
A pinion is a part of a wheel or gear that is used to transmit motion or engage with another gear.
Examples
  • The pinion of the clock mechanism caused the gears to turn smoothly.
  • The bird spread its pinions to take flight from the branch.
Meaning
In a broader context, the term pinion can also refer to the outer part of a bird’s wing that includes the flight feathers.
Synonyms
  • wheel
  • gear
  • feather