duplication

/ˌduːplɪˈkeɪʃən/

  • Noun
  • the act or process of copying something
    1. He sent the manuscript out for duplication.
  • the state of containing copies of something or being a copy of something
    1. Please eliminate duplication when combining the lists.
    2. It was a needless duplication of work. [=they did the work twice though they did not need to]