Plagiarism is an act of include the words ,thoughts and ideas in your work of another author as your own words and not mention the original author or creator of those words and ideas. We make assignments, projects and reports and use the materials of other author without citing them. Plagiarism is the type of cheating. Sometime we do paraphrasing but doing paraphrasing of original ideas without documenting and citing our source is also the plagiarism. To avoid plagiarism we have to use the quotation around the words that is related to the creator. And write the reference. Shortly, plagiarism is the worst offense.