subfloor

[ suhb-flawr, -flohr ]
/ ˈsʌbˌflɔr, -ˌfloʊr /

noun

a rough floor beneath a finished floor.
Often sub·floor·ing.

Origin of subfloor

Also called blind floor.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for subfloor

subfloor

/ (ˈsʌbˌflɔː) /

noun

a rough floor that forms a base for a finished floor
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012