Definitions:
a musical or vocal sound with reference to its pitch, quality, and strength

the general character or attitude of a place, piece of writing, situation, etc.

a basic interval in classical western music, equal to two semitones and separating, for example, the first and second notes of an ordinary scale (such as c and d, or e and f sharp); a major second

the particular quality of brightness, deepness, or hue of a shade of a colour

(in some languages, such as chinese) a particular pitch pattern on a syllable used to make semantic distinctions.

the normal level of firmness or slight contraction in a resting muscle

give greater strength or firmness to (the body or a muscle)

give (a monochrome picture) an altered colour in finishing by means of a chemical solution