stronghold

[ strawng-hohld, strong- ]
/ ˈstrɔŋˌhoʊld, ˈstrɒŋ- /

noun

a well-fortified place; fortress.
a place that serves as the center of a group, as of militants or of persons holding a controversial viewpoint: The campus was a stronghold of liberalism.

Origin of stronghold

late Middle English word dating back to 1375–1425; see origin at strong, hold1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for stronghold

stronghold

/ (ˈstrɒŋˌhəʊld) /

noun

a defensible place; fortress
a major centre or area of predominance

Word Origin for stronghold

C15: from strong + hold 1 (in the archaic sense: a fortified place)
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