(1):

(a.) Giving sound when struck; resonant; as, sonorous metals.

(2):

(a.) Yielding sound; characterized by sound; vocal; sonant; as, the vowels are sonorous.

(3):

(a.) Impressive in sound; high-sounding.

(4):

(a.) Sonant; vibrant; hence, of sounds produced in a cavity, deep-toned; as, sonorous rhonchi.

(5):

(a.) Loud-sounding; giving a clear or loud sound; as, a sonorous voice.