/ig"looh/ , n. , pl. igloos .
1. an Eskimo house, being a dome-shaped hut usually built of blocks of hard snow.
2. Informal. any dome-shaped construction thought to resemble an igloo: immense silos topped with steel igloos.
3. Mil. a dome-shaped building for the storage of rockets or other munitions.
4. an excavation made by a seal in the snow over its breathing hole in the ice.
Also, iglu .
[ 1855-60; iglu house ]