Plagiarism

n. use of another person's written work without acknowledging the source; unauthorized use of patented or copyrighted materials

Plagiarism (from the Latin plagiare, "to kidnap") is the practice of claiming, or implying, original authorship of (or incorporating material from) someone else's written or creative work, in whole or in part, into one's own without adequate acknowledgement. Unlike cases of forgery, in which the authenticity of the writing, document, or some other kind of object, itself is in question, plagiarism is concerned with the issue of false attribution. Plagiarism can also occur unconsciously; in some cultures certain forms of plagiarism are accepted because the concept can be interpreted differently.
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Plagiarism, n an appropriation of the work, ideas, or words of another without proper acknowledgment. [more]Plagiarism - Community and Resources

Noun
1. a piece of writing that has been copied from someone else and is presented as being your own work
(hypernym) writing, written material, piece of writing
(derivation) plagiarize, plagiarise, lift
2. the act of plagiarizing; taking someone's words or ideas as if they were your own
(synonym) plagiarization, plagiarisation, piracy
(hypernym) copyright infringement, infringement of copyright
(derivation) plagiarize, plagiarise, lift

(n.)
The act or practice of plagiarizing.
  

(n.)
That which plagiarized.