(1):

(n.) A thundering; thunder.

(2):

(n.) Reciting in a musical prolonged tone; intonating, or singing of the opening phrase of a plain-chant, psalm, or canticle by a single voice, as of a priest. See Intone, v. t.

(3):

(n.) The act of sounding the tones of the musical scale.

(4):

(n.) Singing or playing in good tune or otherwise; as, her intonation was false.