Plagiarism is the appropriation or copying a publication of another author's (or yourself if you use part of your previously published work) previous work in the language, thoughts, ideas, or expressions and the representation as one's own and original work. Plagiarism and copyright infringement overlap, but they are not equivalent concepts, and many types of plagiarism do not constitute copyright infringement. I also understand copyright as a part of registered or patented work.
A person may have permission from the copyright owner to reproduce (so it's not infringement), but it is still plagiarism. Equally, someone copying an out of copyright work (because the original is so old) ijs also not infringing, but is still plagiarising. On the other hand, one can infringe copyright without plagiarising, e.g., copying someone's text, but including it in something completely novel and not relevant to the original text. I disagree with Gloria in that copyright is nothing to do with patents or other registered works; copyright is something quite separate.
Plagiarism is appropriation of the expressed idea in a medium (e.g. writing) of someones work and making it your own. Copyright infringement covers the possession and distribution without permission of another persons work but without attribution as your own. In plagiarism you are usually also likely violating the copyright (depends on the notion of copyright by jurisdiction)
Plagiarism and copyright are not the same. But sometimes we can be confused about both . If you use the material of someone, with no mentions or references, and pretending that is your creation, it's Plagiarism.
In case of copyrigths, it need to be apropiated previosly. You need to protect your idea oe production, and as a consequence, you have a negative right against others -They can use without permission this information, its a copyright example.
Plagiarism and copyright infringement are not the same. You can plagiarize without infringing copyright, and you can infringe copyright without plagiarizing. Although they are two separate concepts, plagiarism and copyright infringement can occur at the same time.
I may be the owner of an intellectual property and never have taken a copyright for it officially. Still that remains in my name and I am the owner of it. If someone else is copying from it then that is plagiarizing.
Copyright infringement can be said to have committed when that person has plagiarized from an intellectual property for which copyright has been taken by the owner.
So plagiarism and copyright infringement are not the same.