Meaning of the word "on the shelf" in English

What does "on the shelf" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

on the shelf

US /ɑn ðə ʃɛlf/
UK /ɑn ðə ʃɛlf/
"on the shelf" picture

Idiom

1.

no longer considered attractive or useful, especially for marriage (often used for women)

Example:
She worried about being left on the shelf as she got older.
Many women feel pressure not to be left on the shelf.
2.

not being used or considered for a long time

Example:
The old project has been sitting on the shelf for years.
His brilliant idea was put on the shelf due to lack of funding.
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