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open house

1 ENTRIES FOUND:
open house noun
plural open houses
open house
noun
plural open houses
Britannica Dictionary definition of OPEN HOUSE
[count] US : an event in which an organization (such as a school or company) invites the public to visit in order to see the things that happen there
called also (British) open day
[count] US : an event in which anyone who is interested in buying a particular house, apartment, etc., is invited to go inside and look at it
chiefly British : a home or other place in which guests or visitors are welcome
[noncount]
[singular]