octosyllabic UK /ˌɒk.təʊ.sɪˈlæb.ɪk/US /ˌɑk.toʊ.sɪˈlæb.ɪk/adjective 1noun 1forms 1 adjective1 •Containing eight syllablesIf you hum or whistle the rhythm of the common English metres,— of the decasyllabic quatrain, or the octosyllabic with alternate sexisyllabic, or other rhythms, […] — 1872 noun1 •A word of eight syllables. formsoctosyllabics
