plagiarism=without their permission
skewl
By copying someone's work, you devalue it. The point of copyright law is to create value through scarcity.
loads of people started copying the website so they deleted it.
The definition of plagiarism is copying someone else's work and claiming it is your own, yes.
The act of verbatim copying is called plagiarism. It involves directly copying someone else's work without giving proper credit or citation.
Do not let them see your work.
hellio
Generally copying someone else's work to pass off as your own is considered plagiarism. You are correct that it would additionally be infringing.
you tell him or her to stop because you don't feel okay with it.
copyright infringement
Copying someone else's work can lead to serious consequences, such as academic penalties, legal action for copyright infringement, damage to reputation, and loss of trust from others.