Definition of "shelf"
noun:
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A flat, rigid, rectangular structure, fixed at right angles to a wall, and used to support, store or display objects.
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The capacity of such an object; as, a shelf of videos.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
A projecting ledge that resembles such an object.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
A reef, shoal or sandbar.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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