Cider (or cyder) is a drink made from fruit juice, most often from apples.
In Europe and Oceania it is an alcoholic drink that is made from apple juice, through a process called fermentation. In the United States and parts of Canada, cider containing alcohol is called hard cider or alcoholic cider, while cider or apple cider means less-sweet, usually unfiltered, apple juice.
In the United States and Canada people drink a special kind of cider around Halloween and Thanksgiving. This cider is usually unfiltered, rather thick, and it is often heated and spiced with cinnamon before drinking it. This is different from the cider in Europe, which usually is not heated.