(idiomatic) Laid aside, unused, abandoned.
(idiomatic, especially of a woman) Unmarried, typically through lack of interest from potential spouses.
(idiomatic, sports) Injured.
Source: en.wiktionary.orgAfter only four weeks on the shelf, the courts ruled that Nintendo was the only company which had the rights to Tetris on home game systems. Source: Internet
After two years sitting on the shelf, Sunrise revisited the project and brought in relative newcomer Kazuki Akane as the new director. Source: Internet
As she approached the area in the aisle where the Drano was on the shelf, a woman, seeing my wife wearing a mask and gloves, pulled her cart across the aisle to block my wife from going farther. Source: Internet
By hanging the rod higher, you can free up space for extra folded clothes which you can keep on the shelf underneath. Source: Internet
Admittedly, my books are hardly the most violent ones on the shelf, and I don’t let the girls read that kind of book anyway, even if it is one of mine. Source: Internet
At the time, the facility was shuttered, and its patented technology had been, effectively, on the shelf for many years. Source: Internet