1. A violent, cold, dry strong northeasterly winter wind that blows down the mountains of central Europe and along the shores of the Adriatic Sea.
2. A wind with a source so cold that, when the air reaches the lowlands or the coast, the dynamic warming is inadequate to raise the air temperature to the normal level for the region; therefore, it is experienced as a cold wind.

Special terms for this wind include, borino, "weak bora" and boraccia, "strong bora".