マッハ Meanings Noun Mach (number) See also: マッハ数 (マッハすう). (at a) fast speed (oft. as マッハで) Words containing マッハ マッハ数 (マッハすう) Mach number マッハ主義 (マッハしゅぎ) Machism (philosophical ideas of Ernst Mach) Jinuma: Japanese Dictionary · Word lists