Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
ceremonious is an adjective meaning "characterized by pomp and ceremony and stately display". It carries 2 recorded senses.
characterized by pomp and ceremony and stately display
rigidly formal or bound by convention
“their ceremonious greetings did not seem heartfelt”
Definitions, synonyms and semantic relations for ceremonious come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.