Journals are similar to magazines in that they are published regularly - (eg. monthly).
Articles in journals are more in-depth and well-researched than magazine articles. They are written by experts in a particular field of study and are based on the author's research.
Most of the library's journal articles are accessed electronically through the journal databases.
A publication is considered to be peer reviewed if its articles go through an official editorial process that involves review and approval by the author's peers (people who are experts in the same subject area). Most (but not all) scholarly publications are peer reviewed.
Some databases will let you restrict your search to peer-reviewed articles while other databases will lack this feature. To find out more about a particular database read the database help page.
How can I tell if a journal is peer-reviewed? See: Peer reviewed journal articles guide