- 1[uncountable, singular] a place or a time at which visitors are welcome It's always open house at their place. We're having a New Year's Day open house from 2 to 6.
- 2[countable] a day when people can visit a school, an organization, etc. and see the work that is done there
- 3[countable] a time when people who are interested in buying a particular house or apartment can look around it
Check pronunciation: open house