1. noun An open discussion between several people. I think we all need to get together and have a round table to come up with a solution to this problem.
2. adjective (often hyphenated) Featuring open discussion between several people. I think we all need to get together and have a round-table meeting to come up with a solution to this problem.
3. (usually capitalized) The table where the legendary King Arthur and his knights would gather. I'm currently reading a book about King Arthur and the Knights of the Round Table.
4. (usually capitalized) A shorthand way to refer to King Arthur and his knights as a group. Morgan Le Fay is a known enemy of the Round Table.