The phrase "groove walls" refers to the indented or ridged surfaces of something, like the interior of a pipe or the sides of a record. It is like a small groove or channel that adds texture or improves functionality. Full definition
This pale blue bathroom with tongue - and - groove wall panels, works well with the black and white roll - top bath, and gives the room an old - fashioned feel. (idealhome.co.uk)
We are going for tongue and groove walls instead of tiles and there is this amazing spot in the new kitchen were I can have a pastry table. (yvestown.com)
The tongue - and - groove wall with built in flatscreen television adds a modern touch. (idealhome.co.uk)