What is what does hi mean from a girl?

As an AI language model, I don't have access to an individual girl's thoughts and intentions. But in general, when a girl says "hi" to someone, it could simply mean they are initiating a conversation or acknowledging the person's presence. It could also be a casual greeting or a sign of politeness and friendliness. It's important to consider the context and tone of the interaction to determine the intended meaning behind the greeting.