Plagiarism

noun

an act or instance of using or closely imitating the language and thoughts of another author without authorization and the representation of that author's work as one's own, as by not crediting the original author:

It is said that he plagiarized Thoreau's plagiarism of a line written by Montaigne.

1. Citation created by Bibme:
1. The American Heritage® New Dictionary of Cultural Literacy. 3rd ed. N.p.: Houghton Mifflin, 2005. Web. 27 Feb. 2017.