Delibes is a proper noun, used as a surname or the name of a composer (e.g., Léo Delibes). It denotes a person or family name and is pronounced with two syllables in French-influenced usage, typically stressed on the first syllable, and preserving the French vowel qualities. In modern English contexts, it’s treated as a single, recognizable surname and spoken with careful vowel articulation rather than anglicized general rules.
Full pronunciation guide