ersatz UK /ˈɛəzæts/US /ˈɛəɹsɑts/adjective 1noun 1forms 3 adjective1 •An inauthentic or inadequate substitute or imitation.Back then, we could only get ersatz coffee. noun1 •Something made in imitation; an effigy or substitute.They don't have the skills to tell ersatz magic from the real thing, for as children they daily invested the ersatz with what imagination they had. — 2003 formsersatzes · more ersatz · most ersatz