1. Makalu - Noun
2. Makalu - Proper noun
a mountain in the Himalayas in Nepal (27,790 feet high)
Source: WordNetNames Everest (barely visible behind the ridge on the left) and Makalu (more prominent on the right) as seen from Darjeeling, India. Source: Internet
That year he also attempted the world’s fifth highest mountain, Makalu, with an American expedition. Source: Internet