Definitions
The floor structure supporting and underlying the visible flooring or other finishing surface such as a carpet
Word origin
From sub- + floor.
Used in a sentence
“The original floor was still there: wide boards, laid tongue-in-groove, not the inferior subfloor they had predicted.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Base beneath boards”8 letters
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