This definition includes copying someone else's ideas, graphs, pictures, or anything that you borrow without giving credit to the originator of the words and ideas. It definitely includes anything you download from an Internet site or copy out of a book, a newspaper, or a magazine. It also includes stealing the ideas of another person without giving her or him proper credit.
Some obvious examples of plagiarism include
Some less-obvious examples include
The ironic thing about committing plagiarism is that most professors prefer that you use quoted material and properly cite it. They want you to come up with your own ideas in a paper, but will usually give you a good deal of credit for the quality and quantity of outside sources you use as well. Learning how to give credit where credit is due is what this tutorial is all about, so it's time to get started.
Source: Pearson Prentice Hall