(North American English, informal) to hit somebody so hard that they fall down
- 1to press a combination of buttons or keys on a computer, telephone, etc. He picked up the telephone and punched out his friend's number.
- 2to make a hole in something or knock something out by hitting it very hard I felt as if all my teeth had been punched out.
- 3to cut something from paper, wood, metal, etc. with a special tool