1. to manage or supervise the execution, use, or conduct of something
2. to give or apply (medicine, treatment, or aid)
3. to give or conduct (a test, oath, or ceremony)

Examples

• The principal administers the school’s daily operations.
• The nurse administers medication to patients every morning.
• The judge administers the oath to new citizens.
• She administers first aid to the injured hiker.
• The teacher administers the final exam next week.
• The government administers social welfare programs.
• The doctor administers the vaccine with care.