1. To pass physically by (someone or something) with great speed. He zipped by before I could ask him about our paychecks. The police cars zipped by our house in pursuit of the criminals.

2. Of time, to pass very easily or pleasantly, as if going fast. Wow, the afternoon completely zipped by! Being stuck inside with the kids when it's raining can be a drag, but try coming up with inventive new games to play with them and the day will zip by.

3. To visit someone or some place for a brief period of time or for a particular purpose. Mary said she'd zip by for a quick visit. I just want to zip by the bank on the way home to deposit this check.