: to rise (as in a meeting or a legislative assembly) to begin speaking to a group
With Lott and Gramm staring at him as he took the floor during debate, McCain called the bill "seriously skewed," but said he would vote for it.Newsweek
At precisely 6:45 a.m. the rowdiness ceases as Sailor, a union safety expert, takes the floor for his weekly lecture. Jack Friedman
2
: to go out onto a dance floor to begin dancing
Several couples took the floor.
… the younger people took the floor, and all the elders sneaked back to their chairs … Sinclair Lewis
3
: to go out onto a basketball court to begin playing
Phillips hopes the scouts notice his quickness, his vision, … the way he changes the flow of a game as soon as he takes the floor. John Gustafson