noun
One appointed as the substitute of others, and empowered to act for them, in their name or their behalf; a substitute in office.
(mining, historical) A person employed to install and remove props, brattices, etc. and to clear gas, for the safety of the miners.
(government) The name for a member of parliament in some countries.
(US) 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.
verb
(informal, nonstandard) to deputise