M-1 noun2 •The Garand semiautomatic rifle, also named the United States Rifle, Caliber .30, M1.Leopard 2s, Challengers and Abrams M-1s have been earmarked for Ukraine and are vastly superior to the Russian main battle tanks. — 2023 •(US) A student visa for vocational and technical education.Educational institutions are required to have SEVP certification with US Immigration and Customs Enforcement in order to admit applicants who have an F-1 or M-1 student visa. — 2025 formsM-1s
