plagiarisation

/ˌpleɪdʒərəˈzeɪʃən/
noun
  1. The act of copying someone else's work, ideas, or words and presenting them as your own without giving credit.
    • The author's reputation was ruined by the plagiarisation of several passages from a famous novel.
    • The student was expelled for the plagiarisation of an entire essay from an online source.
    • Plagiarisation is considered a serious offense in academic and professional settings.