Genesis means a beginning or origin, the point where something first comes into existence. When scientists study the genesis of a thunderstorm, they're investigating how it formed from warm air and moisture. When a teacher asks about the genesis of your science fair idea, she wants to know what first sparked your thinking.

The word carries a sense of importance: it suggests something significant emerging rather than just any random start. You might talk about the genesis of the internet, the genesis of a friendship, or the genesis of a revolutionary discovery.

Genesis is also the name of the first book of the Bible, which describes the creation of the world and of humanity. Today, whether discussing the genesis of the solar system or the genesis of jazz music, the word points to those crucial first moments when something new comes into being.