I. Mont Blanc 1 /ˌmɒŋ ˈblɑːŋ $ ˌməʊŋ-/ BrE AmE
a mountain in the Alps on the border between France and Italy. It is the highest mountain in western Europe, and there is a ↑ tunnel through it for cars to drive between France and Italy.
II. Mont Blanc 2 BrE AmE
trademark a very expensive type of pen