noun a feather; a quill.
2. pinion ·noun a fetter for the arm.
3. pinion ·noun a wing, literal or figurative.
4. pinion ·vt to disable by cutting off the pinion joint.
5. pinion ·noun the joint of bird's wing most remote from the body.
6. pinion ·vt to bind or confine the wings of; to confine by binding the wings.
7. pinion ·vt hence, generally, to confine; to bind; to tie up.
8. pinion ·vt to disable or restrain, as a person, by binding the arms, ·esp. by binding the arms to the body.
9. pinion ·noun a moth of the genus lithophane, as l. antennata, whose larva bores large holes in young peaches and apples.
10. pinion ·noun a cogwheel with a small number of teeth, or leaves, adapted to engage with a larger wheel, or rack (see rack); ·esp., such a wheel having its leaves formed of the substance of the arbor or spindle which is its axis.