open day 
noun British
A day when members of the public may visit a place or institution to which they do not usually have access.Rooms were used on race days, public open days and pre-booked groups, which viewed the course from the rear of the building....
- The public contributed on an open day, before the forum's conclusions were fed back to the city council.
- The town council hopes most of the work could be paid for through grants, but 76 per cent of those who visited it on the open days said they would be willing to pay extra council tax to fund it.
- overplough
- overploughing
- overplus
- overpole
- overpoled
- overpopulate
- overpopulation
- overpopulous
- over-pot
- overpotential
- over-potting
- overpour
- overpower
- over-powerful
- overpowering
- overpoweringly
- overpraise
- overpreach
- overprecise
- over-prepare
- overprescribe
- overprescription
- overpress
- overpressed
- overpressing