From Wiktionary, the free dictionary
From musical + -ise.
musicalise (third-person singular simple present musicalises, present participle musicalising, simple past and past participle musicalised) (British spelling)
- To set (a text etc) to music.
1997, Stephen Citron, The Musical from the Inside Out, Elephant Paperbacks, →ISBN, page 108:Although she [Maurine Watkins] was adamant about it throughout her lifetime, after she was dead, her executors gave permission to musicalise her work.
- To compose music for a dramatic work.