Tris ‧ tan and I ‧ sol ‧ de /ˌtrɪstən ənd ɪˈzɒlde $ -ɪˈsəʊld/ BrE AmE
two characters in an old love story. Tristan falls in love with Isolde, who is the wife of his uncle, when they drink a magic LOVE POTION without realizing what they are drinking. Their story is told in an ↑ opera by Richard Wagner.