In a legislature:

Floor function in mathematics

The generality of the house members, as opposed to committee

Interest rate floor in finance

Floor (gymnastics), a specially prepared exercise surface

Floor, the lower surface of a room, or a level of a building

The part of the house assigned to the members, as opposed to the viewing gallery

flooring, the surface of a floor

noise floor in Audio noise measurement

Floor, a Dutch given name for girls as well as boys, derived from the Latin florere, meaning "to be with flowers, to bloom", as in Floor Jansen (a female singer) or Floor Wibaut (a male politician)

in public speaking, such as a legislature or town hall meeting, the person currently allowed to speak is said to "have the floor"