Definitions

1. noun

a small container, typically made of wood, used for storing small items, especially a wooden container for storing nuts

“She kept her small treasures in a nutshell on her dresser.”

2. noun

a brief summary or account of something, especially the main points or essence of a complex matter

“The professor gave a nutshell explanation of the difficult concept in class.”

3. verb

to summarize or describe briefly, especially the main points or essence of a complex matter

“The writer tried to nutshell the long, complicated story into a few sentences.”