Shelf (?), n.; pl. Shelves (#). [OE. shelfe, schelfe, AS. scylfe; akin to G. schelfe, Icel. skjalf. In senses 2 & 3, perhaps a different word (cf. Shelve, v. i.).]
1. Arch.
A flat tablet or ledge of any material set horizontally at a distance from the floor, to hold objects of use or ornament.
2.
A sand bank in the sea, or a rock, or ledge of rocks, rendering the water shallow, and dangerous to ships.
On the tawny sands and shelves.
Milton.
On the secret shelves with fury cast.
Dryden.
3. Mining
A stratum lying in a very even manner; a flat, projecting layer of rock.
4. Naut.
A piece of timber running the whole length of a vessel inside the timberheads.
D. Kemp.
To lay on the shelf, to lay aside as unnecessary or useless; to dismiss; to discard.
© Webster 1913.