No, Les Misérables is not an opera. It is a musical. While both operas and musicals combine music, singing, and drama, they differ in several key ways.
Operas are typically entirely sung, with little to no spoken dialogue. The music in operas is often more complex and is usually composed in a classical style. In contrast, musicals like Les Misérables include both singing and spoken dialogue. The music in musicals tends to be more accessible and is often influenced by popular music styles.
Les Misérables, based on the novel by Victor Hugo, is known for its powerful score and emotional storytelling. It has been performed worldwide and is one of the most famous musicals in the world. While it shares some similarities with opera, such as its dramatic themes and use of music to convey emotion, it is firmly classified as a musical.