Deputy (noun)

1. A person appointed or elected to act for or in place of another.
2. A person who holds a position of authority or responsibility as a representative of another.
3. A person who is authorized to act as the representative of a sheriff or other law enforcement officer.

Origin:

From old french deputé, past participle of deputer ("to depute"), from latin deputare ("to appoint"), from de ("from, away") + putare ("to think, consider"). .

Examples:

1. The deputy mayor will be representing the mayor at the meeting.
2. He was appointed as the deputy manager of the company.
3. The sheriff's deputy helped to maintain law and order in the town.
4. She was the deputy leader of the opposition.
5. The deputy chief of police was responsible for the department's operations.