Definition of palacious in US English:

palacious

adjective

rare
  • Palatial.

Origin

Early 17th century; earliest use found in Thomas Dekker (c1572–1632), playwright and pamphleteer. From classical Latin Palātium palace + -ous; compare -acious, -ious.

Pronunciation

palacious

/pəˈleɪʃəs/