Cider is an alcoholic drink made from fermented apple juice.
Alcoholic cider is called hard cider in the US to distinguish it from the non-alcoholic apple cider which is called sweet cider.
Cider alcohol content by volume varies from 1.2% to 13%, depending on a country’s regulations for producing cider which is variable from country to country.
For example in Canada, cider must contain at least 2.5% alcohol by volume and not more than 13% and it must be produced from fermented apple juice. (Laws Justice regulations)