a day set apart for receiving visitors; an at-home day.

hours when visitors may call, spec. to see a person in a hospital or other institution.

the night on which guests are entertained at a club, college, etc.

Originally and chiefly North American. An occasion when an organization, school, company, etc., brings its services, products, etc., to public…

A day when members of the public may visit a school, university, or other institution usually having restricted access. Cf. open house, n. 2b.