When an article is considered "peer reviewed or refereed, that means that it has undergone the peer review process.
Peer review is a process in which an article is judged by an impartial panel of two or more experts in the field; these experts are called "peer reviewers." Peer reviewers primarily focus on ensuring that an article does not have any errors or biases, that the article's findings make a substantial contribution to its field, and that the article provides new information within its specified field.
In order to find scholarly, peer-reviewed journal articles, it is most efficient to use the library's databases. Many of the Library’s databases allow you to apply a filter for peer-review articles so your results are all peer-reviewed.
Visit this page titled “What is Peer-review” for further details on how to find and iidentity a pee-reviewed article.