Real Dictionary

pinion
verb: If you are pinioned, someone prevents you from moving or escaping, especially by holding or tying your arms.

pinion in American English 1
the last bony section of a bird's wing
to cut off or bind the pinions of (a bird) to keep it from flying
noun: a gear with a small number of teeth, esp. one engaging with a rack or larger gear

pinion in American English 2
a small gear, the teeth of which fit into those of a larger gear or those of a rack
noun: the distal or terminal segment of the wing of a bird consisting of the carpus, metacarpus, and phalanges
transitive verb: to cut off the pinion of (a wing) or bind (the wings), as in order to prevent a bird from flying

pinion in British English 1
to hold or bind (the arms) of (a person) so as to restrain or immobilize him or her
noun: a bird's wing

pinion in British English 2
noun: a cogwheel that engages with a larger wheel or rack, which it drives or by which it is driven