In`to*na"tion, n. [Cf. F.
intonation. See Intone.] (Mus.)
(a) The act of sounding the tones of the musical
scale. (b) Singing or playing in good tune
or otherwise; as, her intonation was false.
(c) 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,
In`to*na"tion (?), n. [See 1st
Intonate.] A thundering; thunder. [Obs.]