Meaning of “floor” - Learner’s Dictionary

floor

noun uk us /flɔːr/
SURFACE [ C ]

A1 a surface that you walk on inside a building:

a wooden/tiled floor
I must sweep the kitchen floor.
BUILDING [ C ]

A2 a particular level of a building:

the second/third floor
Which floor are we on?
BOTTOM [ no plural ]

the ground or surface at the bottom of something:

the forest/sea floor
AREA [ C ]

B1 an area where a particular activity happens:

a dance floor
→ See also first floor , ground floor , shop floor

(Definition of “floor” from the Cambridge Learner’s Dictionary © Cambridge University Press)