Wiktionary
n. A wine to which additional ethanol (an alcohol) has been added, the most common additive being brandy (a spirit distilled from wine).
WordNet
n. wine to which alcohol (usually grape brandy) has been added
Wikipedia
Usage examples of "fortified wine".
Always in some pain from the disease that eroded his body, Colum had taken fortified wine in the evenings, to help him to sleep.
Duffy was lying down on a cot the captain of the guard had told him he could use, but he was far from asleep, in spite of the extra cup of fortified wine the captain had insisted he drink.
The Wizard settled into his favorite chair before the fire, and poured himself a goblet of fortified wine.
Waiting for the four jugs to be brought up from the cellar, the two newly met comrades ordered a mug each of the same fortified wine, or one near enough, and ensconced themselves at the least noisy end of the long serving counter in the tumultuous tavern.
Nor did we need words to know that one of us must taste for poison in the strengthening broth and fortified wine we dribbled into Uther’.
There were Healer kits of bandages, numbweed, fellis juice, and fortified wine for riders to bring with them.