Bob, yeah. That's McGrath's Oxford Dictionary definition #5, which is what I think we're discussing. 'Tone' meaning the quality of the sound, as in the tone of a note played on a violin verses the tone of the same note played on a flute, doesn't rise and fall and is separated from pitch.

The overtones mentioned are undoubtedly why, when I sing a C into an electronic tuner, the tuner reads it as a G. I know for sure it's a C, but the overtones in my voice are strong enough to fool the tuner. Does this tone vs pitch thing why I can sing the same exact notes as a deep-voiced man, and it sounds like he's an octave below me?