What is the meaning of Deputy?

One appointed as the substitute of others, and empowered to act for them, in their name or their behalf; a substitute in office.

A person employed to install and remove props, brattices, etc. and to clear gas, for the safety of the miners.

The name for a member of parliament in some countries.

A member of the French National Assembly.

A member of the French Chamber of Deputies, formerly called Corps Législatif.

A member of Dáil Éireann, or the title of a member of Dáil Éireann.

a law enforcement officer who works for the county sheriff's office; a deputy sheriff or sheriff's deputy; the entry level rank in such an agency.

to deputise

Source: wiktionary.org