The Collaborative International Dictionary of English v.0.48:

Concourse \Con"course\, n. [F. concours, L. concursus, fr.
   concurrere to run together. See Concur.]
   1. A moving, flowing, or running together; confluence.
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            The good frame of the universe was not the product
            of chance or fortuitous concourse of particles of
            matter.                               --Sir M. Hale.
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   2. An assembly; a gathering formed by a voluntary or
      spontaneous moving and meeting in one place.
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            Amidst the concourse were to be seen the noble
            ladies of Milan, in gay, fantastic cars, shining in
            silk brocade.                         --Prescott.
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   3. The place or point of meeting or junction of two bodies.
      [Obs.]
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            The drop will begin to move toward the concourse of
            the glasses.                          --Sir I.
                                                  Newton.
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   4. An open space where several roads or paths meet; esp. an
      open space in a park where several roads meet.
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   5. Concurrence; cooperation. [Obs.]
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            The divine providence is wont to afford its
            concourse to such proceeding.         --Barrow.
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WordNet (r) 3.0 (2006):

concourse
    n 1: a large gathering of people [syn: multitude, throng,
         concourse]
    2: a wide hallway in a building where people can walk
    3: a coming together of people [syn: concourse, confluence]