From Longman Dictionary of Contemporary Englishpunch in phrasal verb1 American EnglishBEC to record the time that you arrive at work, by putting a card into a special machine SYN clock in British English2 punch something ↔ inTD to put information into a computer by pressing buttons or keys → punch→ See Verb tableFrom Longman Business Dictionarypunch in to make a hole in a card as a record of the time when you arrived at work, especially at a factory → punch→ See Verb table