Definition of substantious in US English:

substantious

adjective

Scottish
rare
  • Prominent, respectable, reputable; wealthy, well-to-do.

Origin

Late 15th century (in an earlier sense). From Middle French substantieux, substancieux (French † substancieux) nourishing, important, substantial from substance + -ieux.

Pronunciation

substantious

/səbˈstanʃəs/