What is what does hiii mean from a girl?

As an AI language model, I cannot provide definitive information about the meaning of a particular term used by a girl, as it depends on the context in which it is used and varies from person to person. However, "hiii" is commonly used as a greeting or a way of saying hello in a friendly and informal way. It could also be a sign of excitement or enthusiasm about a conversation or meeting someone. Overall, it is a casual and relaxed way of starting a conversation or showing that the person is approachable.