noun, plural ig·loos.
an Eskimo house, being a dome-shaped hut usually built of blocks of hard snow.
Informal. any dome-shaped construction thought to resemble an igloo: immense silos topped with steel igloos.
Military. a dome-shaped building for the storage of rockets or other munitions.
an excavation made by a seal in the snow over its breathing hole in the ice.
Origin of igloo
First recorded in 1855–60, igloo is from the Inuit word iglu house
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -loos or -lus
a dome-shaped Inuit house, usually built of blocks of solid snow
a hollow made by a seal in the snow over its breathing hole in the ice
Word Origin for igloo
C19: from Inuktitut igdlu house
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1824, Canadian English, from an Eskimo word for "house, dwelling" (cf. Greenlandic igdlo "house").
Online Etymology Dictionary, © 2010 Douglas Harper