STMA Views 8 meanings found STMA can refer to a software testing adapter, an educational institution named St Thomas More Academy, a regional railroad company, or business associations representing manufacturers and merchants in South Texas. Miscellaneous Shade Tree Micro Aviation Statistical Theory and Method Abstracts Space Time Multiple Access Community South Texas Manufacturers Association South Texas Merchants Association Academic & Science St Thomas More Academy Regional St. Maries River Railroad Company Computing Software Test Management Adapter