4. Impressive in sound; high-sounding. The Italian opera, amidst all the meanness and familiarty of the thoughts, has something beautiful and sonorous in the expression. (Addison) There is nothing of the artificial Johnsonian balance in his style. It is as often marked by a pregnant brevity as by a sonorous amplitude. (E. Everett)
Origin: L. Sonorus, fr. Sonor, -oris, a sound, akin to sonus a sound.