Definition of souterrain in English:

souterrain

Line breaks: sou|ter¦rain
Pronunciation: /ˈsuːtəreɪn
 
/

noun

chiefly Archaeology
  • An underground chamber or passage.
    More example sentences
    • Irish houses, moreover, were now often built in close association with souterrains, stone-lined, underground passages, sometimes as much as 100 metres in length.
    • The situation in south-west England is broadly comparable to southern Scotland, with rounds (small enclosed homesteads), courtyard houses, and souterrains present, though only one villa has been recognized west of Exeter.
    • A massive prehistoric underground bunker - or souterrain - has been excavated near Dundee.

Origin

mid 18th century: from French, from sous 'under' + terre 'earth'.

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