n. A thundering; thunder.n. Utterance of tones; mode of enunciation; modulation of the voice in speaking; also, expression of sentiment or emotion by variations of tone: as, his intonation was resonant or harsh.n. The act of intoning or speaking with the singing voice; specifically, the use of musical tones in ecclesiastical delivery: as, the intonation of the litany.n. In music: The process or act of producing tones in general or a particular series of tones, like a scale, especially with the voice.n. In plain-song, the two or more notes leading up to the dominant or reciting-tone of a chant or melody, and usually sung by but one or a few voices. The proper intonation varies with the mode used, and also with the text to be sung.