AIML stands for Artificial Intelligence Markup Language. It is a XML-based language that is used to create conversational agents or chatbots. AIML defines a set of rules for pattern matching and responding to text inputs, allowing the chatbot to simulate human-like conversations. It is often used in the development of simple rule-based chatbots, and it was popularized by the A.L.I.C.E. (Artificial Linguistic Internet Computer Entity)