<p><strong>Noun</strong></p><ul><li>a thin slab of wood, metal, etc., fixed horizontally to a wall or in a frame, for supporting objects.</li><li>the contents of this: a shelf of books.</li><li>a surface or projection resembling this: ledge.</li><li>Physical Geography: a sandbank or submerged extent of rock in the sea or river.</li><li>the bedrock underlying an alluvial deposit or the like.</li><li>continental shelf.</li><li>Archery: the upper part of the bow hand, on which the arrow rests.</li></ul>