"Main hallway" refers to the central pathway or corridor in a building that connects different rooms or areas. It is usually the most prominent or frequently used pathway. Full definition
Once, when my oldest son was a toddler, we had the experience I just described: He found some markers and joyfully created a beautiful mural all over the walls in the freshly painted main hallway of our house. (attachmentparenting.org)
It's also well - known for big advertising blitzes, and so out in the public, main hallway at CES you will find huge banners advertising a new smart fridge with a massive screen. (theverge.com)
The dining area and main hallway feature a domed ceiling, constructed with red bricks, opening the space and adding a rustic charm. (luxuryretreats.com)