This bill, titled the ADVERSARIES Act, aims to enhance the effectiveness of the Export Control Reform Act of 2018 by modifying key definitions. Its primary objective is to broaden the scope of entities subject to export control regulations, particularly those linked to strategic adversaries and national security concerns. The legislation specifically amends the definition of "person" or "entity" to explicitly include several categories. These categories are: Chinese military companies identified under the William M. (Mac) Thornberry National Defense Authorization Act for Fiscal Year 2021; entities listed in Supplement No. 4 (the Entity List) and Supplement No. 7 (the Military End User List) to part 744 of title 15, Code of Federal Regulations, by the Bureau of Industry and Security; and any subsidiary or affiliate owned 50 percent or more by such identified entities. Furthermore, the bill modifies another definition by striking the term "foreign," which could expand the application of certain export control provisions to include domestic entities that meet specified criteria. These changes are intended to address dangerous vulnerabilities in exports and research to strategic adversaries and entities of security concern.