(1):

(v. t.) To utter in a musical or sonorous manner; to chant; as, to intonate the liturgy.

(2):

(v. i.) To modulate the voice in a musical, sonorous, and measured manner, as in reading the liturgy; to intone.

(3):

(v. i.) To sound the tones of the musical scale; to practice the sol-fa.

(4):

(v. i.) To thunder.