son et lumière UK /ˈsɒn eɪ ˈluːmɪˌɛə/US /ˌsɔn eɪ ˌlum(i)ˈjɛəɹ/ noun1 •An outdoor show consisting of special lighting effects projected onto a building, accompanied by music or narration.The Loire Valley's favorite form of cultural entertainment is son-et-lumiere, a dramatic spectacle. — 1992