Definition of stronghold
1
: a fortified place
2a
: a place of security or survival
one of the last strongholds of the ancient Gaelic language— George Holmes
b
: a place dominated by a particular group or marked by a particular characteristic
a Republican stronghold strongholds of snobbery— Lionel Trilling
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Merriam-Webster unabridged
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Time Traveler for stronghold
The first known use of stronghold was in the 15th century
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