- [uncountable, singular]
a place or a time at which visitors are welcome 开放;开放时间 - (North American English) (British English open day)[countable]
a day when people can visit a school, an organization, etc. and see the work that is done there (学校、机关等的)开放日,开放参观日 - [countable]
a time when people who are interested in buying a particular house or apartment can look around it (为欲购房者而设的)看房时间