Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
splendiferous is an adjective meaning "having great beauty and splendor". It carries one recorded sense.
having great beauty and splendor
“a glorious spring morning”
“a glorious sunset”
“splendid costumes”
“a kind of splendiferous native simplicity”
Definitions, synonyms and semantic relations for splendiferous come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.