Definition of multisyllable in English:

multisyllable

Pronunciation /ˌmʌltɪˈsɪləbl/

noun

rare
  • A polysyllable.

adjective

Origin

Mid 17th century; earliest use found in Obadiah Walker (1616–1699), college head and author. From multi- + syllable. Compare post-classical Latin multisyllabus, adjective.