Definition of "megamusical"

Save the C-notes for eye-filling megamusicals or, maybe, a good-for-you drama of intellectual aspirations, preferably with a script from England and a star from Hollywood.

2007 August 2, Ben Brantley, “Titters, Snickers and Guffaws, With a British Accent”, in New York Times‎

Jukeboxes have frequently been compared to the megamusicals and are considered a direct offshoot.

2022, Kevin Byrne, Emily Fuchs, The Jukebox Musical: An Interpretive History‎, Taylor & Francis