1 [count] : the part of a room on which you stand
▪ Keep your feet on the floor. ▪ washing the kitchen floor ▪ a marble/tile/hardwood floor 2 [count] a : the lower inside surface of something (such as a vehicle)
▪ the floor of a car
b : the area of ground at the bottom of something — usually singular ▪ the ocean floor ▪ the forest floor 3 [count] : a level in a building
▪ She lives on the second floor of a five-story building. ▪ His office is located on the fourth floor. — see also first floor, ground floor 4 [count] : a large indoor space where people gather for some activity — usually singular ▪ the floor of the convention/legislature ▪ the factory floor ▪ the dance floor ▪ buying and selling shares on the floor of the exchange 5 [singular] : the people who are gathered in a place for a public meeting
▪ He will now take questions from the floor. 6 [count] : a lower limit — usually singular ▪ establishing a floor for wages and prices ▪ The value of the stock has dropped/gone/fallen through the floor. [=to a very low level] — opposite ceiling