Meaning of clock in in English clock in phrasal verb with clock verb [ T ] uk / klɒk / us / klɑːk / informal (UK also clock on) Add to word list Add to word list to record the time you arrive at work on a special machine:

clock in (third-person singular simple present clocks in, present participle clocking in, simple past and past participle clocked in) (US) To begin working time, especially by punching in (entering a workplace by punching a time card with the time clock).

clock in (also punch in) to record the time at which you arrive at work, especially by putting a card into a machine Staff should clock in on arrival.