On has 12 different meanings across 4 categories:
Adjective · Adverb · Proper Noun · Prep
In the Japanese language, a pronunciation, or reading, of a kanji character that was originally based on the character's pronunciation in Chinese, contrasted with kun.
to switch on
in a state required for something to function or be effective
"turn the lights on"
"get a load on"
To an operating state.
Abbreviation of Ontario, a province of Canada.
Positioned at the upper surface of, touching from above.
Without.