Cider (also spelled: cyder) refers to a beverage containing the juice of apples. In Europe and Oceania, the term refers to fermented apple juice. In North America cider is normally unfermented; when fermented, it is known as "hard cider" or "alcoholic cider".

Apple ciders are often made from blends of several different apples to give a balanced taste. Some businesses may try to pass off standard apple juice as cider. There is some local competitiveness among cider mills in apple country for the highest quality blends, and makers keep their formulas secret. One trick used to add interest to a cider blend is the addition of a percentage of crabapples. Cider doughnuts are often sold at cider mills and contain cider in the batter.

note: in the picture unfermented cider on the left, apple juice on the right.