1. A hanging sculpture: This is the most common meaning of "mobile" as a noun. It refers to a type of kinetic sculpture consisting of balanced figures or shapes suspended from a framework and capable of moving freely.
2. A device that can move: This meaning is less common but still valid. It refers to any device that is designed to be portable and capable of moving, such as a mobile phone, a mobile home, or a mobile library.
Example sentences:
* "The children were mesmerized by the colorful mobile hanging above their crib." (referring to the sculpture)
* "She used her mobile phone to take a photo of the beautiful sunset." (referring to the device)
Therefore, the meaning of "mobile" as a noun depends on the context in which it is used.