belle époquePronunciation: /ˌbɛl eɪˈpɒk, bɛl epɔk/Definition of belle époque noun the period of settled and comfortable life preceding the First World War: [as modifier]:a romantic, belle-époque replica of a Paris bistroOrigin:French, 'fine period'belle époque in other Oxford dictionaries Definition of belle époque in the US English dictionary