strongroom
noun/ˈstrɒŋruːm/, /ˈstrɒŋrʊm/
/ˈstrɔːŋruːm/, /ˈstrɔːŋrʊm/
- a room, for example in a bank, with thick walls and a strong, solid door, where valuable items are kept
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strongroom
Definition of strongroom noun from the Oxford Advanced Learner's Dictionary