polysyllable Meaning, Definition & Usage

  1. noun a word of more than three syllables
    polysyllabic word.

WordNet

Pol"y*syl`la*ble noun
Etymology
Poly- + syllable.
Definitions
  1. A word of many syllables, or consisting of more syllables than three; -- words of less than four syllables being called monosyllables, dissyllables, and trisyllables.

Webster 1913