tone

1 tone /ˈtoʊn/ noun
plural tones
1 tone
/ˈtoʊn/
noun
plural tones
Britannica Dictionary definition of TONE
1 
[count]
a  : the quality of a person's voice
b  : the quality of a sound produced by a musical instrument or singing voice
2 
[count]
a  : a quality, feeling, or attitude expressed by the words that someone uses in speaking or writing
b  : the general quality of a place, situation, etc.
3 
[count]
a  : a shade of color
— see also earth tone
b  : a small amount of a color
4 
[noncount] : strength and firmness of the muscles or skin
5 
[noncount] : the highness or lowness of a spoken syllable — see also tone language
6 
[count] : a sound made as a signal by a machine (such as a telephone or answering machine)
— see also dial tone, ringtone
7 
[count] music
a  : a sound of a particular pitch and vibration
b  chiefly British : whole step
2 tone /ˈtoʊn/ verb
tones; toned; toning
2 tone
/ˈtoʊn/
verb
tones; toned; toning
Britannica Dictionary definition of TONE
[+ object]
: to give strength and firmness to (something, such as muscles or skin)

tone down

[phrasal verb]
1 
tone (something) down or tone down (something)
: to make (something) less forceful, offensive, or harsh
2 
: to make (something) less bright or colorful

tone in

[phrasal verb]
tone in with (something) British
: to match the color of (something)