trans·marine \|tran(t)s, -raan-, -nz+\adjective Etymology: Latin transmarinus, from trans- + mare sea + -inus -ine — more at marine 1.: being or coming from beyond or across the sea < a transmarine people > 2.: passing over or extending across the sea : overseas < the successive transmarine thrusts of Britain, Japan, and the United States — Foreign Policy Bulletin >