Definition of scientific journal:

It is a series of issues that are printed and published like a newspaper, but in a more specialized manner and are related to a specific field, as they are published either every week or even every month or every six months, depending on the period specified by the owner of the scientific journal and the desired goal of that. In addition to that, the journal may have a body responsible for publishing and judging the acceptance of research for publication, and thus it is a peer-reviewed scientific journal, or it may even be without a clear committee that is satisfied with only containing scientific articles, and thus it is an ordinary scientific journal, and in both cases its ultimate goal is science and nothing else.