An open day is a day on which members of the public are encouraged to visit a particular school, university, or other institution to see what it is like.
[British]regional note: in AM, use open house
open day in British English
noun
an occasion on which an institution, such as a school, is open for inspection by the public
Also called: at-home. US and Canadian name: open house
Examples of 'open day' in a sentence
open day
Many farms run open days and welcome school visits.
Times, Sunday Times (2006)
It could be a country fair or a public school open day.
The Sun (2012)
She chose to fly home a day early to attend a university open day.
Times, Sunday Times (2012)
You won't be at the school open day.
Times, Sunday Times (2009)
For example, both parents should be present on open day visits.
Times, Sunday Times (2014)
Open days Contact the school.
Times, Sunday Times (2006)
Open days Contact the university.
Times, Sunday Times (2006)
There will be public open days held in the empty structure, and 100,000 visitors are expected.
Times, Sunday Times (2009)
There are work experience opportunities, public open days, talks and lectures.
Times, Sunday Times (2010)
When you don't hold an open day at school, you weaken the already fragile link between parents and teachers.