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predictor

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Etymology and origin of the English word predictor

Confidence
Established
Formation
Borrowing
First attested
1641 T. Heywood, Life of Merlin
Borrowed from
Latin praedictor
Ultimate origin
Latin dīcō

Pronunciation

  • UK: /pɹɪˈdɪk.tə/[1]
  • US: /pɹɪˈdɪk.tɚ/[1]

Etymology

It is borrowed from Late Latin praedictor (“one who foretells, prophet”),[2][3][4][5] recorded in post-classical Latin from the 5th century,[2] and called Medieval Latin by Etymonline and Merriam-Webster.[3][4] It is an agent noun formed with -or on praedictus, the past participle of praedīcō (“to foretell”),[2][4][3] which is formed from prae- (“before”) and dīcō (“to say”),[6][3] the source of predict.[2][3] The OED compares Middle French prédicteur, recorded in 1597, and the earlier English predicter.[2] Johnson (1755) took it simply as a derivative of predict.[7]

Earliest recorded meaning

A person or thing that foretells something: 1641, in T. Heywood's Life of Merlin.[2] Etymonline dates the word to the 1650s, and Dictionary.com to 1645–55.[3][5]

Semantic evolution

Johnson (1755) defined it simply as "foreteller", with a quotation from Swift.[7] The 20th century added two technical senses: in military use, from 1926, an apparatus that worked out the aim of an anti-aircraft gun from observations of the target, now historical;[2][4][8] and in statistics, from 1943, a variable whose value is used to estimate another,[2] a sense Etymonline dates to 1950.[3] Collins calls it a more modern term for an independent variable.[8]

Timeline

  • 1641 – a person or thing that predicts.[2] Etymonline dates the word to the 1650s.[3]
  • 1926 – an apparatus that supplies an anti-aircraft gun with tracking information.[2]
  • 1943 – in statistics, a variable used to estimate another variable.[2] Etymonline dates this sense to 1950.[3]

Meanings

Noun

  1. A person or thing that predicts or foretells: Early reading skill is a strong predictor of later success at school.[8][4][2]
  2. (statistics) A variable whose values are used to estimate those of another; an independent variable.[8][2]
  3. (military, historical) An instrument that calculated the height, speed and course of enemy aircraft to aim an anti-aircraft gun.[8][4][2]

References

  1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ a b c d e f g h i Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  5. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  6. ^ The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
  7. ^ a b Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
  8. ^ a b c d e Collins English Dictionary (2023), Glasgow: HarperCollins

Related etymologies

Cite this entry

“Predictor.” Etymologically, 2 Nov. 2026, etymologically.com/en/predictor. Accessed 2 Nov. 2026.

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