| punch [pǝnch] COMPUTER SCIENCE 1. A device for making holes representing information in a medium such as cards or paper tape, in response to signals sent to it. 2. A hole in a medium such as a card or paper tape, generally made in an array with other holes (or lack of holes) to represent information. DESIGN ENGINEERING See <<nail set>> MECHANICAL ENGINEERING A tool that forces metal into a die for extrusion or similar operations. |