1. Originally the word "mocha" referred only to a very fine coffee grown in Arabia and shipped from Yemen's port of Mocha. Today, this strong, slightly bitter coffee is still available but not as popular as it was in the 16th and 17th centuries. 2. A hot coffee-and-chocolate beverage. This flavor combination is also used in desserts, icings, candies and sweet sauces. See also café mocha.