Definitions

1. noun

a plank or board forming part of a floor

“The old house had creaky floorboards that groaned underfoot.”

2. noun

a component of a floor, especially in a wooden floor

“The carpenter carefully fitted the new floorboard into place.”

3. noun

a level or story of a building, especially in a multistory structure

“The third floorboard of the building had a beautiful view of the city.”