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English definition of “floor”

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floor

noun uk   /flɔːr/ us    /flɔːr/

floor noun (SURFACE)

A1 [C usually singular] the flat surface of a room on which you walk: The floor was partly covered with a dirty old rug. The bathroom floor needs cleaning. The children sat playing on the floor. There's barely enough floor space to fit a bed in this room.
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floor noun (LEVEL OF BUILDING)

A2 [C] a level of a building: This building has five floors. Take the elevator to the 51st floor. We live on the third floor. a ground floor apartment
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floor noun (OPEN SPACE)

B1 [C usually singular] a public space for activities such as dancing and having formal discussions: a dance floor The new proposal will be discussed on the floor of the senate tomorrow. He spent several years working on the factory floor (= in the factory) before becoming a manager. The chairman said that he would now take questions from the floor (= from the audience).have the floor to have the right to speak: Silence, please, the prime minister has the floor.take (to) the floor to stand and begin to dance: The newlyweds were the first to take the floor.take the floor start speaking: The Majority Leader again took the floor.
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floor noun (BOTTOM)

the floor the bottom surface of the sea, a forest, a cave, etc.: the floor of the ocean/the ocean floor

floor

verb uk   /flɔːr/ us    /flɔːr/

floor verb (HIT)

[T] to hit someone and cause them to fall: He was floored with a single punch to the head.

floor verb (SURPRISE/CONFUSE)

[T often passive] informal to surprise or confuse someone so much that they are unable to think what to say or do next: I didn't know what to say - I was completely floored.
Idioms
(Definition of floor from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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