Quai d'OrsayPronunciation: /ˌkeɪ dɔːˈseɪ, kɛ dɔʀsɛ/Definition of Quai d'Orsay a riverside street on the left bank of the Seine in Paris. the French ministry of foreign affairs, which has its headquarters in this street. Quai d'Orsay in other Oxford dictionaries Definition of Quai d'Orsay in the US English dictionary