In this comprehensive analysis, we delve into the critical role of defining Artificial Intelligence (AI) in shaping regulatory frameworks worldwide. The article examines the European Union’s Artificial Intelligence Act (AIA) as a pivotal example, exploring its unique approach to defining AI. It compares this with definitions from the United States, China, Canada, and perspectives from industry leaders and academia, highlighting the global diversity in understanding AI. The piece underscores the importance of a unified definition in developing effective regulations, emphasizing the need for ongoing collaboration among governments, industry, and academia to keep pace with AI’s rapid advancements.