Definition of altisonant in English:

altisonant

adjective

rare
  • High-sounding, lofty, pompous, loud.

Origin

Early 17th century; earliest use found in Thomas Shelton (fl. 1598–1629), translator. From classical Latin altisonus that sounds high up or in the heavens + -ant.

Pronunciation

altisonant

/alˈtɪsənənt/