1. a system or process for employees to record the time they stop working, typically by inserting a time card into a machine
Usage: often used in contrast with 'punch in' or 'clock in'
2. a knockout blow in boxing or a decisive victory
Usage: informal

1. to record the time one stops working by using a time clock or system
Usage: often used as 'punch out'
2. to knock someone out or defeat someone decisively
Usage: informal

Examples

• Don't forget to punch out before you leave the factory.
• She punched out at 5 p.m. sharp every day.
• The boxer delivered a powerful punchout in the third round.
• He punched out his opponent with a single blow.
• Employees must punch out using their time cards.
• The team's punchout in the final game secured their championship.