1. to manage or supervise the execution of something
2. to give or apply a medicine, treatment, or test
3. to give out or impose something such as punishment or an oath

Examples

• The principal will administer the school’s new policy.
• She administers a large government department.
• The nurse administered the vaccine to all the patients.
• The doctor administered pain medication after the surgery.
• The teacher will administer the final exam next week.
• The judge administered the oath to the new citizens.
• The referee administered a penalty to the player.