onto

Pronunciation

• IPA: UK /ˈɒn.tuː/, US /ˈɑːn.tuː/^[1]

Etymology

It is a compound, from English on + to,^[2][3][4] written separately at first and later as one word, on the analogy of into.^[2]

Earliest recorded meaning

To a position on, as in stepping on to a stage: 1581, written on to.^[3][4] Etymonline dates the phrase to the 1580s.^[2]

Semantic evolution

It appeared much later than the parallel forms into and unto.^[2] The closed form onto is recorded from 1715 in Etymonline^[2] and in Keats's Otho the Great (1819) in Barnhart.^[3] The Century Dictionary of 1895 said purists regarded it as vulgar and careful writers avoided it.^[2] “Aware of, informed about”, as in the police are onto him, is a later colloquial sense.^[5][6] In mathematics onto describes a mapping that covers every element of the second set, from 1942.^[4][5] In many dialects of Scotland and England onto was used for “on” or “upon”.^[7]

Timeline

• 1581 – on to, to a position on.^[3][4]
• 1715 – written as one word.^[2]
• 1819 – onto in Keats.^[3]
• 1942 – in mathematics.^[4]

Modern meaning

Preposition

1. To a position on or upon: jump onto the bed.
2. (informal) Aware of; informed about: we're onto your tricks.
3. In contact with: get onto the council.

Adjective

1. (mathematics) Of a mapping, such that every element of the second set is the image of some element of the first.

Word family

• onto function

Related words

• on
• to
• into
• unto

Usage notes

The Cambridge pronouncing dictionary notes that /ˈɒn.tuː/ is rare except when the word is said on its own; /ˈɒn.tə/ is usual before consonants and /ˈɒn.tu/ before vowels.^[1] Writers distinguish onto (motion to a position on something) from on to, where on is an adverb: they walked on to the next town.^[5]

References

1. ^ a b Jones, Daniel (2011), Cambridge English Pronouncing Dictionary, 18th ed., ed. Peter Roach, Jane Setter and John Esling, Cambridge: Cambridge University Press
2. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
3. ^ a b c d e Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
4. ^ a b c d e Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
5. ^ a b c The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
6. ^ Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
7. ^ Wright, Joseph, ed. (1898–1905), The English Dialect Dictionary, 6 vols., Oxford: Henry Frowde; via EDD Online 4.0, University of Innsbruck (CC BY 4.0)