Definition of Panglossianism in US English:

Panglossianism

noun

  • The belief that all occurrences or developments have a beneficial purpose or result; naive or unrealistic optimism.

Origin

1960s; earliest use found in ‘Anthony Burgess’ (1917–1993), writer and composer (real name John Burgess Wilson). From Panglossian + -ism.

Pronunciation

Panglossianism

/panˈɡlɒsɪənɪz(ə)m/