Definition of concourses:
(n) :
A large open space in or in front of a building where people can gather, particularly one joining various paths, as in a rail station or airport terminal, or providing access to and linking the platforms in a railway terminus.
(n) :
An airport terminal.
(n) :
A large group of people; a crowd.
(n) :
An open space, especially in a park, where several roads or paths meet.
(n) :
The running or flowing together of things; the meeting of things; a confluence.
(n) :
(obsolete, uncountable) Concurrence; cooperation.