* In a very brief and concise way: It implies summarizing something complex in a very short, simple, and direct way, as if you were putting the whole story in the shell of a nut.
* In a basic, essential way: It focuses on the most important points, leaving out unnecessary details.
Here are some examples:
* "Can you explain the theory in a nutshell?"
* "He gave a nutshell summary of the meeting."
* "Let me tell you the story in a nutshell."
It's important to note that "nutshell" does not mean "completely." While it emphasizes brevity and simplicity, it doesn't necessarily mean omitting all details, just the less important ones.