1. noun /təʊn,toʊn/
a) A specific pitch.
See Also: atonal, tonal, diatonic, intonation, intone, monotone, ringtone, tone-deaf, tone-deafness, tonality, tonic, tonicity, tune
2. verb /təʊn,toʊn/
a) to give a particular tone to<!but in what sense of the noun?
b) to change the colour of
3. pronoun /təʊn,toʊn/
The one (of two).
So wythin the thirde day, there cam to the cité thes two brethirne: the tone hyght Sir Helyus and the other hyght Helake [...].
Wikipedia foundation.