éminence grise UK /ˌɛmɪnɒns ˈɡɹiːz/US /ˌɛmɪnɑns ˈɡɹiz/ noun1 •A secret or unofficial decision-maker.But Harry Hopkins was no mere manipulator of people and ideas, no eminence grise masterminding the actions of figureheads. — 1987 formseminence grises · eminences grises · éminence grises · éminences grises
