0 a shelf that is fixed onto a wall using nails or screws that cannot be seen, rather than being supported by brackets (= L-shaped pieces of metal, wood, or plastic):
Light-coloured floating shelves create interest in this dining area.
The bed frame is made from American black walnut and the headboard incorporates floating shelves on either side.
She suggested a few built-in floating shelves and lilac paint.
What sort of storage do you want? Basic bracketed shelves? Shelves in a chimney breast recess? Floating shelves?