Minority-serving institutions (MSIs) are unique in their ability to support the educational advancement of students of color. Approximately one in five postsecondary institutions are eligible for funding under an MSI designation, yet more than half of all undergraduate students of color are enrolled in such colleges and universities. However, there continues to be great disagreement and confusion about how to define MSIs. Researchers, policymakers, advocacy organizations, and even institutions themselves have advanced different and inconsistent definitions as to what might be considered an MSI. Given these contrasting constructions of MSIs, the purpose of this article is to offer a uniform definition and typology as to how MSIs should be defined and to construct an MSI dataset based upon this approach. We assert that this approach will yield more accuracy to the description and study of MSIs, which will greatly benefit and inform the work of institutional leaders, advocates, policymakers, and the broader MSI research community.