#1 pinion n. a gear with a small number of teeth designed to mesh with a larger wheel or rack. wn
#2 pinion v. [shackle] bind the arms of. wn
#3 pinion n. [flight feather, quill, quill feather] any of the larger wing or tail feathers of a bird. wn
#4 pinion v. cut the wings off (of birds). wn
#5 pinion n. [pennon] wing of a bird. wn
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