Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
nouveau-riche is a noun and adjective meaning "a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class". It carries 2 recorded senses.
a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class
characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new position
Definitions, synonyms and semantic relations for nouveau-riche come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.