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Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
platitudinous is an adjective meaning "dull and tiresome but with pretensions of significance or originality". It carries one recorded sense.
dull and tiresome but with pretensions of significance or originality
“bromidic sermons”
Definitions, synonyms and semantic relations for platitudinous come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.