Cider can mean many different things depending on where you are. In the United Kingdom  cider refers to an alcoholic beverage made from fermented apples. In the USA cider refers to a sweet, unfermented apple juice and the term Hard Cider refers to the fermented alcoholic beverage from apples.

Definition From Farnum Hill: Cider: an alcoholic beverage fermented from apples, as wine is an alcoholic beverage fermented from grapes. The cider-making & wine-making crafts have much in common. Prohibition devastated both in the U.S, but only cider lost its true name. In the U.S. ‘cider’ has only begun to reclaim its worldwide meaning.