Definitions of floor
the lowest limit
To prevent dramatic swings in their funding the government introduced the concept of a minimum floor of a 3% rise and a maximum ceiling of 7%.
the part of a building in which members of a legislature meet to debate issues and conduct business
Let me say up front that I come to the Senate floor reluctantly.
the trading area where securities and commodities are bought and sold on an exchange
In the past, if you agreed to a trade, your broker would get hold of someone on the trading floor.