- a floor made from sawed, straight-grained timber.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for plank floor
Two are placed side by side, and kept together by a plank-floor, common to both, and lying on the gunwales.
My footfall upon the plank-floor sounded heavy and harsh, as I strode over it, making a survey of the “premises”—my future home.The Wild Huntress