Definition of Floor

A term used metaphorically, in parliamentary practice, to denote the exclusive right to address the body in session. A member who has been recognized by the chairman, and who is in order, is said to "have the floor”, until his remarks are concluded. Similarly, the "floor of the house” means the main part of the hall where the members sit, as distinguished from the galleries, or from the corridors or lobbies.

Trading area where stocks and commodities are bought and sold on exchanges.

The lower limit; e.g. minimum wages; lowest price stock will be permitted to fall before selling.

In England, the floor of a court is that part between the judge’s bench, and the front row of counsel. Litigants appearing in person, in the high court or court of appeal, are supposed to address the court from the floor

That's the definition of Floor in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.