A peer-reviewed article is an in-depth research article written by experts for experts and has been blind reviewed by at least two external reviewers. To determine if an article is peer-reviewed, look up the journal name in which the article is published in Ulrichsweb also available from the Databases by Title (A-Z) list on the library homepage
Once you are in Ulrichsweb, enter the the journal name into the search box. In the results if a referee's-shirt icon appears next to the journal title, then it is refereed and scholarly:
Use this guide to determine whether an article is scholarly Distinguishing among Scholarly, Popular, and Trade Journals.