A reserve or substitute.
reinforcements
A copy of a file or record, stored separately from the original, that can be used to recover the original if it is destroyed or damaged.
An accumulation of material caused by a (partial) obstruction or (complete) blockage of the flow or movement of the material, or an accumulation of material that causes an overflow due to the flow being greater than the maximum possible flow.
Supporting, reinforcing; (music) of or related to accompaniment
Standby, reserve or extra.
That is intended as a backup.
One appointed as the substitute of others, and empowered to act for them, in their name or their behalf; a substitute in office.
A member of the Chamber of Deputies, formerly called Corps Législatif.
a member of Dáil Éireann, or the title of a member of Dáil Éireann. (Normally capitalised in both cases).
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.
A person employed to install and remove props, brattices, etc. and to clear gas, for the safety of the miners.
to deputise