Answer: I'm not sure if this is what you're asking, but that definition matches up with the definition of a sculpture.
Explanation:
The main difference, generally speaking, is that a musical tells a story with song and dance, while a play typically sticks to spoken dialogue. This is a broad generalization; some plays feature musical content, and some musicals feature heavy amounts of spoken dialogue.
It seems there is no right or wrong answer to this, it just your personal answers.