Red or white wine that is heated with various citrus fruits and spices such as cinnamon, cloves, allspice or nutmeg. Mulled wine is generally sweetened with sugar and often fortified with a spirit, usually brandy. Some recipes call for stirring the hot wine mixture into beaten eggs, which adds flavor and body to the beverage.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.