Open House
WordNet
noun
(1) An informal party of people with hospitality for all comers
WiktionaryText
Noun
- A house which is for sale and is open for inspection or tour by interested parties. Most houses for sale on the market are open on weekends.
- A casual school event where the school invites parents or guardians to come and tour their child's school, classrooms, and allow them to meet their child's teachers.