clair de lunePronunciation: /ˌklɛːdəˈluːn/Definition of clair de lune noun [mass noun] a soft white or pale blue-grey colour. a Chinese porcelain glaze of a soft white or pale blue-grey colour. Origin: late 19th century: French, literally 'moonlight'clair de lune in other Oxford dictionaries Definition of clair de lune in the US English dictionary