His parents were Count Albert II of Gorizia and Euphemia of Mätsch.

From 1362 when Henry V of Gorizia died, he ruled alongside Albert III.

The princes of Gorizia had to mortgage and sell more and more of their possessions to salvage their worsening financial position.

Meinhard was involved in power struggles with his ecclesiastical neighbours, and in disputes with the Habsburg dynasty about the succession in the Duchy of Carinthia and the County of Tyrol.

After her death, he married Utehild, the daughter of Vogt Ulrich IV of Mätsch.