1. a person who leads or controls a group, organization, or military unit
2. a naval officer of high rank, typically above lieutenant commander and below captain
Usage: military; nautical

Examples

• The commander ordered his troops to advance at dawn.
• She was promoted to commander after years of dedicated service.
• The fire department commander coordinated the emergency response.
• Commander Johnson briefed the crew before the mission.
• The base commander welcomed the visiting officials.
• As squadron commander, he was responsible for fifty pilots.
• The naval commander studied the charts carefully.