IIIVMM refers to a specific designation in Roman numerals, where "III" represents 3, "V" represents 5, and "MM" represents 2000, totaling 2008. However, it might also refer to different contexts or acronyms in various fields. Without additional context, it's challenging to provide a precise definition. If you have a specific area in mind—such as technology, finance, or literature—please clarify for a more tailored response.