Meaning: full and loud and deep; "heavy sounds"; "a herald chosen for his sonorous voice"
Sonorous and startling came the stroke of 9 from the clock tower.
But this frog in the sugar-cane swamp was the same fellow that on summer evenings, ever and ever so many years ago, in sonorous bass that could be heard a quarter of a mile away, used to call from Reuben Loud's pond, "Pull him in!
The girl's reply, accompanied by a pretty inclination of her head toward the Frenchman, was lost in the accents of the first speaker--a strong and sonorous voice, in strange contrast with his ravaged appearance and distressing cough.
The good doctor was even with his word in the matter, and gave out some very sonorous discourses, without in the least stopping the round of gaieties kept up by these dissipated Katy-dids, which ran on, night after night, till the celebrated Jack Frost epidemic, which occurred somewhere about the first of September.