Position:
* Below: This is the most common meaning. It indicates something is positioned lower than something else, often physically.
* Example: "The cat is under the table."
* Beneath: Similar to "below," but sometimes used to emphasize being covered or hidden.
* Example: "The treasure was buried under the sand."
Quantity:
* Less than: Used to indicate a smaller amount or number.
* Example: "He was under 21 years old."
Other:
* Subject to: Indicates someone or something is controlled by or affected by something else.
* Example: "She was under a lot of stress."
* During: Can indicate a time period.
* Example: "We met under the full moon."
* In the process of: Can indicate an action or state of being.
* Example: "The project is under construction."
* In the care of: Indicates something is being taken care of or supervised by someone.
* Example: "The child was under the care of a doctor."
Phrases:
* Under the weather: Feeling unwell or sick.
* Under wraps: Kept secret.
* Under the influence: Being affected by alcohol or drugs.
* Under attack: Being subjected to an attack.
To determine the specific meaning of "under," consider the context in which it's used.