A peer-reviewed scholarly journal is one in which the articles have been reviewed by the peers of the author(s), i.e. scholars or experts in that subject area, before being published in that journal.

For example, an article in The American Historical Review has been written by a history scholar with academic credentials and reviewed by historians with similar credentials.  Likewise, the articles in CPA Journal have been written and reviewed by Certified Public Accountants or other specialists in the area of accounting on which they are writing.

This is different from a reporter or a features writer who reports on a variety of topics in newspapers, news and specialty magazines.  While a reporter may be assigned to an area, such as business or crime, s/he is not an expert in that subject and has not earned any degrees or certification in that field.

You may limit to peer-reviewed journals in Academic Search Complete and Research Library databases, by selecting the box for scholarly, peer-reviewed in the limits box of the search screen.

The GALILEO tutorial has more discussion on scholarly, peer reviewed vs. popular articles.