Definitionen
1.NounA flat, rigid structure, fixed at right angles to a wall or forming a part of a cabinet, desk, etc., and used to display, store, or support objects."We keep the old newspapers on the bottom shelf of the cupboard, and our photos on the top shelf."
2.NounThe capacity of such an object"a shelf of videos"
3.NounA projecting ledge that resembles such an object.
4.NounThe part of a repository where shelvesets are stored.
5.VerbAlternative form of shelve.
6.NounA reef, sandbar, or shoal.
7.Noun↑ Douglas Harper (2001–2026), “shelf (n.2)”, in Online Etymology Dictionary.
8.VerbAlternative form of shelve.