A rock opera is a style of music that tells a story using a combination of rock music and theatrical elements. It's like a musical but with more emphasis on rock and pop music styles. Full definition
This song will be classic 80's rock opera style. (kickstarter.com)
Mixing slasher - movie tropes into a supernatural romantic fantasy with elements of rock opera, in collaboration with an actual star singer - songwriter? (filmfreakcentral.net)
One Fordham student passed around mimeographed sheet music parodying the British rock opera Jesus Christ Superstar. (si.com)