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English definition of “open house”

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open house

noun uk   us  
[U or S] a situation in which people welcome visitors at any time: We keep open house, so come and see us any time. [C] a time when a house or apartment that is being sold can be looked at by the public [C] ( UK open day) a day when an organization such as a school, college, or factory allows members of the public to go in and see what happens there
(Definition of open house from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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