supernumerary

Từ điển American Heritage Dictionary 4th

su·per·nu·mer·ar·y (so͞o'pər-no͞oʹmə-rĕr'ē, -nyo͞oʹ-)adj.
1. Exceeding a fixed, prescribed, or standard number; extra.
2. Exceeding the required or desired number or amount; superfluous. See Synonyms at superfluous.n. pl. su·per·nu·mer·ar·ies
1. One that is in excess of the regular, necessary, or usual number.
2. An actor without a speaking part, as one who appears in a crowd scene. [Latin supernumerārius: super, above; see super- + numerum, accusative of numerus, number; See nem- in Indo-European Roots.]

• Từ đồng nghĩa / Synonyms:
  excess, extra, redundant, spare, supererogatory, superfluous, surplus, spear carrier