Hol ‧ i ‧ day, Bil ‧ lie /ˈhɒlədeɪ, ˈhɒlɪdeɪ $ ˈhɑː-, ˈbɪli/ BrE AmE
(1915–59) a US ↑ jazz and BLUES singer, who was also called ‘Lady Day’ and is regarded as one of the greatest jazz and blues singers ever. She wrote her life story in a book called Lady Sings the Blues , which was later made into a film.