1. to teach someone a subject or skill
2. to give someone an order or direction about what they should do

Examples

• The teacher instructs students in mathematics.
• She instructs the dance class every Tuesday.
• The manual instructs users to restart the computer.
• The judge instructs the jury on the law.
• He instructs his assistant to file the reports.
• The coach instructs players on proper technique.
• The recipe instructs you to preheat the oven.