Definition of platitudinism in English:

platitudinism

noun

Pronunciation

platitudinism

/ˌplatɪˈtjuːd(ə)nɪz(ə)m/ /ˌplatɪˈtʃuːd(ə)nɪz(ə)m/

Origin

Mid 19th century; earliest use found in The Atlantic Monthly. From platitude + -in- + -ism, after e.g. latitudinism.