How to Spell on
on
on - preposition
- —used as a function word to indicate position in contact with and supported by the top surface of
- With respect to
Source: Merriam-Webster Dictionary API
Etymology
Middle English {it}an, on{/it}, preposition & adverb, from Old English; akin to Old High German {it}ana{/it} on, Greek {it}ana{/it} up, on
Middle English an, on, preposition & adverb, from Old English; akin to Old High German ana on, Greek ana up, on