What is alive language?

There's no established concept or term called "alive language". It's possible that it's a term used in a specific context or by a particular group, but without more information, it's difficult to say what it means.

However, we can analyze possible interpretations:

* Metaphorically alive: One could argue that a language is alive if it's actively used, evolving, and adapting to changes in society and technology. This contrasts with a dead language which is no longer spoken by anyone. Examples of "alive" languages in this sense would be English, Spanish, Mandarin, etc.

* A specific linguistic theory: There might be a specific linguistic theory or framework that uses the term "alive language" with a specific meaning. Without knowing the source or context, it's impossible to know what this could be.

* A made-up term: It's also possible that "alive language" is a made-up term used in a particular context or creative work.

To understand what "alive language" means, you need more context:

* Where did you hear this term?

* What was the discussion or context surrounding it?

With more information, we can better understand the intended meaning of "alive language".