noun, often attributive \ˈflr\

: the part of a room on which you stand

: the lower inside surface of something (such as a vehicle)

: the area of ground at the bottom of something

Full Definition of FLOOR

:  the level base of a room
a :  the lower inside surface of a hollow structure (as a cave or bodily part)
b :  a ground surface <the ocean floor>
a :  a structure dividing a building into stories; also :  story
b :  the occupants of such a floor
:  the surface of a structure on which one travels <the floor of a bridge>
a :  a main level space (as in a stock exchange or legislative chamber) distinguished from a platform or gallery
b :  the specially prepared or marked area on which indoor sports events take place
c :  the members of an assembly <took questions from the floor>
d :  the right to address an assembly <the senator from Utah has the floor>
:  a lower limit :  base
floored adjective
from the floor
:  in field goals as opposed to free throws <made 16 of 18 shots from the floor>

Examples of FLOOR

  1. Keep your feet on the floor.
  2. the floor of a car
  3. She lives on the second floor of a five-story building.
  4. His office is located on the fourth floor.

Origin of FLOOR

Middle English flor, from Old English flōr; akin to Old High German fluor meadow, Latin planus level, and perhaps to Greek planasthai to wander
First Known Use: before 12th century

Related to FLOOR

bed, bottom

Other Architecture Terms

buttress, casita, cornice, fanlight, garret, lintel, parapet, pilaster, plinth



: to cover (a surface) with material to make a floor

: to knock (someone) to the floor or ground

: to surprise, shock or amaze (someone) very much

Full Definition of FLOOR

transitive verb
:  to cover with a floor or flooring
a :  to knock or bring down
b :  flabbergast, dumbfound
:  to press (the accelerator of a vehicle) to the floorboard; also :  to accelerate rapidly <floored the van>
floor·er noun

Examples of FLOOR

  1. He floored me with his first punch.
  2. The news just floored me.

First Known Use of FLOOR

15th century


noun \ˈflō(ə)r, ˈfl(ə)r\   (Medical Dictionary)

Medical Definition of FLOOR

: the lower inside surface of a hollow anatomical structure <the floor of the pelvis>


noun    (Concise Encyclopedia)

Rigid building assembly that divides space horizontally into stories. It forms the bottom of a room. It may consist of joist-supported wood planks or panels, decking or panels supported by wood or steel beams, a slab of stone or concrete on the ground, or a reinforced-concrete slab carried by concrete beams and columns. The floor assembly must support its own dead load plus the live load of occupants, activities, and furnishings. The horizontal supports beneath its top surface—and the vertical supports into which they frame—must be sufficiently large and spaced closely enough to prevent sagging of the assembly.


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