An example of a shelf is where books are kept in the library.
- A flat ledge jutting out from a cliff.
- A sandbar or sandy reef.
- From ready-made merchandise in stock:.Supplies that were available off the shelf.
- In a state of disuse or inactivity:.The injured goalie has been on the shelf for weeks.
- Out of consideration:.The finance bill is on the shelf until next year.
- Out of use, activity, or circulation.