Plagiarism is:
1. copying and pasting without citing sources, using quotation marks, or paraphrasing
2. self-plagiarism - reusing work you have previously written and turned in
3. creating fake citations
4. substituting synonyms for words in a passage that has been copied and pasted
5. paraphrasing multiple passages from multiple sources
Check out this video from Bainbridge State College (https://www.youtube.com/watch?v=2q0NlWcTq1Y):