GRAND SIÈCLE Meaning of GRAND SIÈCLE in English [ ˌgrɒ~ sɪ'ɛkl(ə) \]■ noun the reign of Louis XIV, seen as France's period of political and cultural pre-eminence.OriginFr., lit. 'great century or age'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004