1. an official rule or law that controls how something is done
2. the act of controlling or managing something according to rules

1. conforming to or required by official rules; standard

Examples

• The new safety regulations require all workers to wear helmets.
• Government regulation of the banking industry has increased.
• Students must follow school regulations at all times.
• The regulation uniform includes a white shirt and blue tie.
• Environmental regulations protect our water supply.
• The regulation size for a basketball court is 94 feet long.
• Financial regulation helps prevent market crashes.