On – definition of on by The Free Dictionary

ON abbr. 1. Old Norse 2. Ontario on (ŏn, ôn) prep. 1. a. Used to indicate position above and supported by or in contact with: The vase is on the table. We rested on our hands and knees. b. Used to indicate contact with or extent over (a surface) regardless of position: a picture on the wall; a rash on my back. c. Used to indicate location at or along …

: https://www.thefreedictionary.com/on