What is On the shelf?
On the shelf definition and meaning on Dictionary terms:
noun, plural shelves [shelvz] /E?E?lvz/.
a thin slab of wood, metal, etc., fixed horizontally to a wall or in a frame, for supporting objects.
the contents of this: a shelf of books.
a surface or projection resembling this; ledge.
Physical Geography. a sandbank or submerged extent of rock in the sea or river. the bedrock underlying an alluvial deposit or the like. continental shelf.
Archery. the upper part of the bow hand, on which the arrow rests.