never late or always at the same time: In this country the trains are regular as clockwork.

What does regular as clockwork mean?

phrase. DEFINITIONS1. very regularly. She's there every day at 9, regular as clockwork.

Where does the phrase like clockwork come from?

The word clockwork to mean the inner workings of a mechanism came into use with the invention of mechanical clocks. The idioms like clockwork and as regular as clockwork came into use in the mid-1700s.