Answer:
plagiarism is basically the representation of another author's language, thoughts, ideas, or expressions as their own work.
for example, if someone were to take a quote or phrase from robert frost and use it as their own, that would be considered plagiarism.
plagiarism is actually considered a violation of academic integrity, so you can possibly be suspended or expelled for doing it.
hope i helped luv (: have a nice rest of your day.