Definitions for open house
Random House Webster's College Dictionary
a party or reception during which a person's home is open to visitors.
a time during which a school, institution, etc., is open to the public, as for exhibition.
a house or apartment for sale or rent that is available for inspection by prospective clients.
Origin of open house:
an informal party of people with hospitality for all comers
Kernerman English Learner's Dictionary
open house(noun)ˈoʊ pə nər
a time when people can visit a place not normally available to the public
an open house at the school
A house habitually kept open to callers.
An event, often in one's home, at which there are few restrictions regarding who and how many may attend.
An event during which a facility or institution is open to the public for inspection or tour.
A period of time, usually several hours in a day, during which a house which is for sale is open for inspection or tour by interested parties.
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.