* Literal meaning (depth): The pond was only a few feet shallow, making it easy to wade across.
* Figurative meaning (lack of depth): His understanding of the issue was shallow, based on only a few articles he read online.
* Figurative meaning (superficial): Her conversations were always shallow, focusing on trivial matters like fashion and celebrity gossip.
* Figurative meaning (lack of emotion): He wore a shallow smile that didn't reach his eyes, making it clear he wasn't truly happy.
Let me know if you'd like more examples or have a specific meaning in mind!