- peen⇄noun the part of the head of a hammer or sledge, opposite to the face, when rounded, edged, or otherwise shaped for a special use.
Ex. The claw hammer for woodworking and pulling nails is not suitable for metal work which requires a peen on the ha - peen⇄peen, noun, verb.
- peen⇄v.t. to shape, bend, or make less thick by striking regularly all over with the peen of a hammer.
Ex. They divided the heads [of oil drums] into pie-shaped segments, peened them until each segment gave out a separate musical note when struck with