Plagiarism is using others' ideas and/or words without clearly acknowledging the source of that information. It may be intentional (e.g., copying or purchasing papers from an online source) or unintentional (e.g., failing to give credit for an author's ideas that you have paraphrased or summarized in your own words). (UIUC)
You are committing plagiarism if you:
This is not a definitive list — any action in which you misleadingly imply someone else's work is your own can constitute plagiarism.
When you commit plagiarism, you hurt yourself and the community in the following ways:
Unintentional plagiarism: Research-based writing in American institutions is filled with rules that beginning writers may not be aware of or don't know how to follow. Many of these rules have to do with research and proper citation. Sometimes you may not be sure what needs to be cited and what doesn't.
Intentional plagiarism: It may seem easy and harmless to copy and paste sections from articles or papers found online to fill an assignment. You should keep in mind, however, that although such behavior may seem harmless, it actually degrades the quality of education that you are receiving and devalues the degree that you are working toward.