Word.ws English Dictionary

onto

Syllables: on·to/ˈɒn.tuː/

More pronunciations (1)Fewer pronunciations

Northern US/ˈɑn.tu/

onto preposition: arriving upon or on top of (speaking of a physical or metaphorical movement).

Preposition

onto

  1. Arriving upon or on top of (speaking of a physical or metaphorical movement).
    • My cat just jumped onto the keyboard.
    • A new drug has just come onto the market.
    Antonyms:
    off, off of
  2. (informal) Aware of.
    • The thought-police were onto my plans of world domination.
  3. Being an onto function with a codomain of (see below).
    • The exponential function maps the set of real numbers onto the set of positive real numbers.

Adjective

onto (not comparable)

  1. Attaining each of the values in its codomain; having its image equal to its codomain.
    • Considered as a function on the real numbers, the exponential function is not onto, as it never takes on values less than or equal to zero.
    Synonyms:
    surjective

onto meaning in Arabic

onto in Arabic

upon; on top of
عَلَى ʕalā

Examples of onto in a sentence

  • Piling debt onto companies’ balance-sheets is only a small part of what leveraged buy-outs are about, they insist.2013 June 22, “Engineers of a different kind”, in The Economist, volume 407, number 8841, page 70:
  • That means the game was playable offline and could be downloaded onto phones or computers.2022 February 15, David Goldman, “Why your Wordle answers might now be different than your friends’”, in CNN Business:

All 40 example sentences with onto

Synonyms of onto

Antonyms

Forms of onto

alternative Australia Canada Commonwealth Ireland New Zealand South Africa UK including usuallyon to

Origin of onto

From on + to, after into. Compare Saterland Frisian antou (“up to”).

Words formed from onto

Phrases with onto

61 more phrasesFewer phrases

Questions about onto

What does onto mean?
Onto means arriving upon or on top of (speaking of a physical or metaphorical movement).
What is onto in Arabic?
Onto in Arabic is عَلَى (ʕalā). See Onto meaning in Arabic.
How do you use onto in a sentence?
Piling debt onto companies’ balance-sheets is only a small part of what leveraged buy-outs are about, they insist.
What part of speech is onto?
Onto can be a preposition or an adjective.
How do you pronounce onto?
Onto is pronounced /ˈɒn.tuː/ (UK).

Words near onto in the dictionary

  1. ontically
  2. onticities
  3. onticity
  4. Ontiveros
  5. Ontiveroses
  6. onto
  7. onto function
  8. onto functions
  9. onto-
  10. ontoepistemological
  11. ontoepistemologically

Source and license

Adapted from Wiktionary: onto (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-onto.wav, LL-Q1860 (eng)-Wodencafe-onto.wav.

Cite this entry: “onto.” Word.ws, https://word.ws/onto. Based on Wiktionary, CC BY-SA 4.0.