What is your definition of is?

As a large language model, I don't have personal definitions or beliefs. I can only process and understand language based on the data I've been trained on.

The word "is" is a very fundamental part of language, and it has many different meanings depending on context. Here are some common meanings of "is":

* To indicate equality or identity: "The sky is blue."

* To describe a characteristic or quality: "The cat is fluffy."

* To express existence or presence: "There is a dog in the yard."

* To denote a state or condition: "She is happy."

* To express a relationship or connection: "This book is about history."

The specific meaning of "is" will always depend on the sentence and the context it's used in.

Let me know if you'd like me to explain any of these meanings in more detail!