Noun

1. A large open space in a building where people can gather.
2. A large group of people; a crowd.
   • 1727 - Jonathan Swift, Gulliver's Travels, Page 1 first paragraph

     About three years ago, Mr. Gulliver growing weary of the concourse of curious people coming to him at his house in Redriff, made a small purchase of land, with a convenient house, near Newark, in Nottinghamshire, his native country; where he now lives retired, yet in good esteem among his neighbours.

3. The running or flowing together of things; the meeting of things; confluence.
   • 1662 - Thomas Salusbury (translator), Galileo's Dialogue Concerning the Two Chief Systems of the World, First Day:

     ... there was only wanting the concourse of rains ...