An observation compartment in the roof of a railway carriage.
More example sentences
- The upper level seating in the vista domes is unassigned and is open to all passengers on the train.
- On the approach to Union Station, you can clearly see the four vista domes on the train along the top.
- There are six cars including three coaches, two vista domes, and an observation car.
Definition of vista dome in:
- The US English dictionary