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