supernumerary: Meaning and Definition of

su•per•nu•mer•ar•y

1. being in excess of the usual, proper, or prescribed number; additional; extra.
2. associated with a regular body or staff as an assistant or substitute in case of necessity.

1. a supernumerary or extra person or thing.
2. a supernumerary official or employee.
3. a person who appears in a play or film without speaking lines or as part of a crowd; walk-on; extra.