on to
preposition
on to is a preposition meaning “Upon; on top of” (English Wiktionary, September 2026). It is spelled O-N-T-O.
What does on to mean?
preposition
- 1
Upon; on top of.
My cat just jumped on to the keyboard.
- 2
informalAware of.
The thought-police were on to my plans of world domination.
- 3
Used to indicate, or signpost, logical progression to a new topic in a talk or discourse.
Now. On to the system of active water uptake.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of on to
- onto
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Words people confuse with on to
Word pairs people search, with the monthly searches for “a vs b” (G: Google, B: Bing, United States).
Also written: onto (one word or two).
Sources: Google and Bing searches (September 2025 to August 2026, through DataForSEO); English Wiktionary (homophones, alternative spellings).