igloo

UK: /ˈɪgluː/ US: /ˈɪglu/ ,(ig′lo̅o̅)

Inflections of 'igloo' (n): npl: igloos

WordReference Random House Learner's Dictionary of American English © 2025

ig•loo /ˈɪglu/   n. [countable] , pl. -loos. 

1. Anthropology a dome-shaped Eskimo dwelling of blocks of hard snow.

WordReference Random House Unabridged Dictionary of American English © 2025

ig•loo  (ig′lo̅o̅), n., pl. -loos. 

1. Anthropology an Eskimo house, being a dome-shaped hut usually built of blocks of hard snow.
2. Informal Terms any dome-shaped construction thought to resemble an igloo:
   immense silos topped with steel igloos.
3. Military 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, ig′lu. 

• Inuit iglu house
• 1855–60

Collins Concise English Dictionary © HarperCollins Publishers::

igloo, iglu / ˈɪɡluː/ noun ( -loos, -lus)

1. a dome-shaped Inuit house, usually built of blocks of solid snow
2. a hollow made by a seal in the snow over its breathing hole in the ice

Etymology: 19th Century: from Inuktitut igdlu house