a large mass of ice that forms when snow is compressed over a long period and moves very slowly down a mountain or valley, or across a large area of land near the North or South Pole
The glacier at the end of the fjord was sparkling in the sunlight.
Climbers must be careful on the glacier because of hidden crevasses.
✦ From French glacier (“ice, glacier”), from glace (“ice”), from Old French glace, from Vulgar Latin *glacia, from Latin glaciēs (“ice”), from Proto-Indo-European *gel- (“cold”).