Oxford Dictionary Definition - "The practice of taking someone else's work or ideas and passing them off as one's own."
Put exact words in quotation marks with the author's name when you use a source's exact words.
Rewrite source ideas in your own words if not quoting.
Some examples of plagiarism
Accidentally committing plagiarism is still plagiarism
Forgetting to cite a source
Misquoting a source
Purchasing a paper
Reusing your own paper
Getting permission to use someone else's paper
Using ChatGPT
Using mostly quotes and paraphrasing