Definitions
1.nounA wing.
2.nounThe joint of a bird's wing farthest from the body.
3.nounAny of the outermost primary feathers on a bird's wing.
4.nounA moth of the genus Lithophane.
5.nounA fetter for the arm.
6.verbTo cut off the pinion of a bird’s wing, or otherwise disable or bind its wings, in order to prevent it from flying.
7.verbTo bind the arms of someone, so as to deprive him of their use; to disable by so binding.
8.verb(transferred sense) To restrain; to limit.
9.nounThe smallest gear in a gear train.