What is the meaning of the word "tone"?

Definitions:

a pitch or change in pitch of the voice that serves to distinguish words in tonal languages noun
- The Beijing dialect uses four tones.
a steady sound without overtones noun
- They tested your hearing with pure tones of different frequencies.
change the color or tone of verb
- tone a negative
change to a color image verb
- tone a photographic image
give a healthy elasticity to verb
- Let's tone our muscles
in music, the distinctive property of a complex sound such as a voice, noise or musical sound noun
- Your guitar has wicked tone.
the quality of a person's voice noun
- They began in a conversational tone.
the quality of something (an act or a piece of writing) that reveals the attitudes and presuppositions of the author noun
- the general tone of articles appearing in the newspapers is that the government should withdraw