The phrase "greatest musicals" refers to a collection or group of stage productions that are widely considered to be the best and most exceptional in the genre of musical theater. Full definition
Has great musical features that include sound activated dancing and various animal sounds. (omgstroller.com)
Great comedic parts that had me laughing, as well as great musical tracks! (rottentomatoes.com)
-- «The Broadway Melody» (1929): Some people are dismayed by the early sound technology, but get over that and enjoy a lively backstage musical with youthful zest, a spunky performance by Bessie Love and a handful of great musical numbers, including the title song, «Wedding of the Painted Doll» and «Singin» in the Rain.» (sfgate.com)