1 lower surface of a room
ADJ. bare I can't sleep on the bare floor! | carpeted, parquet, tiled, wood, wooden | polished | bathroom, kitchen, etc.
VERB + FLOOR clean, mop, polish, scrub, sweep, wash, wax, wipe | drop to, fall to His glass fell to the floor and broke.
FLOOR + NOUN covering, tile | space
PREP. on the ~ Do you mind sitting on the floor?
PHRASES from floor to ceiling Bookcases lined the walls from floor to ceiling.
2 bottom of the sea, a forest, etc.
ADJ. cave, forest, ocean, sea, valley
3 level in a building
ADJ. bottom, ground | top | first, second, etc. | mezzanine | lower, upper
VERB + FLOOR occupy The offices occupy the two top floors of the building.
PREP. on the ~ a cafe on the mezzanine floor