concourse
n.n. a large, open area in a building where people gather, such as the area around a train station or an airport. It is a formal word for a big, public space.
n. a large, open area or hall in a building, typically used for public gatherings or movement. Often refers to the central area of a railway station or airport.
The travelers gathered on the concourse to wait for their flight.
The new terminal features a vast glass concourse that connects all the different gates and shops.
The architect designed the concourse to serve as a social hub, encouraging spontaneous interactions among passengers while providing a clear path to the departure gates.
From Middle English concours, from Middle French concours and its etymon Latin concursus, concursum, from concurrere (“to run together”). See concur. Doublet of concours.