Definition of tone:

part of speech: verb

To utter in an affected tone; to tune.

part of speech: noun

Sound, or a modification of sound; a particular inflection of the voice as modified by the feelings or passions; the particular sound of the voice in speaking or reading; the state of the body in regard to the healthy performance of its animal functions; in music, an interval of sound; in paint., the harmony of the colours of a picture in light and shade.