The phrase "solid oak" means that something is made entirely of oak wood, without any other materials or artificial substances mixed in. Full definition
A mixture of creamy, painted furniture teamed with solid oak cabinetry makes the most of the light, spacious layout and allows the rustic beams overhead to take centre stage. (idealhome.co.uk)
Made from solid oak with fancy nickel hardware, it's as sturdy as it is stylish. (thespruce.com)
The open - plan dining room occupies a raised platform of solid oak flooring. (idealhome.co.uk)