A "wooden frame" refers to a structure made of wood that is used to support or enclose something. It is a kind of framework that provides stability and shape to an object or construction. Full definition
It has a large cushion with wooden frame for getting a rigid form. (decorationchannel.com)
This artwork is created with high quality artist acrylic paints and stretched on wooden frame with a gallery wrap, therefore shipped flat, not in a roll. (chairish.com)
Simply stretched over wooden frames, then hung over the bed, they add a hefty dose of color and pattern to the room, and the cost was minimal. (thespruce.com)