Etymologically

θεώρημα

Etymology and origin of the Ancient Greek word θεώρημα

Confidence
Established
Formation
Derivation
First attested
400–301 BC Plato, Laws; Demosthenes More words from the 4th century BC
Ultimate origin
Ancient Greek θέα,ὁράω
Etymology tree
inherited borrowed derived
Ancient Greek θέα (théā)
Ancient Greek θεωρός (theōrós)
Ancient Greek θεωρέω (theōréō)
Ancient Greek θεώρημα (theṓrēma)
Latin theōrēma
English theorem
From the same root
Ancient Greek θεωρία (theōríā) ← θεωρός
Ancient Greek θεωρητικός (theōrētikós) ← θεωρέω

Pronunciation

  • 5th-century BC Attic: /tʰe.ɔ̌ː.rɛː.ma/[1]
  • 4th-century AD Koine: /θeˈo.ri.ma/[1]
  • 10th-century Byzantine: /θeˈo.ri.ma/[1]

Forms

θεώρημᾰ (theṓrēma) n (genitive θεωρήμᾰτος); third declension[1]

Etymology

It is from Ancient Greek θεωρέω (theōréō, “to look at, contemplate”) with the suffix -μα (-ma).[1][2] The verb comes from θεωρός (theōrós), a spectator or envoy to a festival, which Beekes explains as “one who watches a show”, *θεᾱϝορός (*theāworós), from θέα (théa, “sight”) and the root of ὁράω (horáō, “to see”).[2] The meanings “theory, theoretical” only developed after Aristotle, from the contemplation of a Form.[2]

Earliest recorded meaning

Plato's Laws uses it for spectacles of the Muses, and Demosthenes for public shows.[3][4][5]

Semantic evolution

Aristotle uses it for an object of contemplation, a vision in dreams, a speculation or theory, a subject for inquiry, and in mathematics a theorem.[3][4] Archimedes and the later geometers made “theorem” the standard technical sense.[3] Polybius uses it for a scheme or plan and, in the plural, for arts and sciences; for Galen the arts are made of θεωρήματα, their rules.[3][4] Early Christian writing uses it for something seen, a vision.[6]

Medieval vernacular Greek had a form θώρημα (thórima), “sight, glance”;[7] in Modern Greek θεώρημα (theórima) is a learned word for a theorem, a proposition to be proved.[8][9]

Timeline

  • 5th–4th century BC – Plato uses it for spectacles.[3][4]
  • 4th century BC – Demosthenes uses it for shows, and Aristotle for objects of contemplation, theories and theorems.[3][4]
  • 3rd century BC – Archimedes uses it for a mathematical theorem.[3]
  • 2nd century BC – Polybius uses it for a plan and for the arts and sciences.[3][4]
  • Modern Greek – It is a learned word for a theorem.[8]

Meanings

Noun

  1. A sight, spectacle, show; generally, a festival.[3][4]
  2. An object of contemplation; a vision.[3][6]
  3. Speculation, theory; a speculative proposition.[3][4]
  4. (mathematics) A theorem.[3][4]
  5. A subject of investigation, a topic.[3][4]
  6. A rule of an art; a scheme or plan; in the plural, arts and sciences, theoretical knowledge.[3][4]

References

  1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c Beekes, Robert S. P. (2010), Etymological Dictionary of Greek, with the assistance of Lucien van Beek, Leiden Indo-European Etymological Dictionary Series 10, Leiden; Boston: Brill
  3. ^ a b c d e f g h i j k l m n Liddell, Henry George; Scott, Robert; Jones, Henry Stuart (1940), A Greek-English Lexicon, 9th ed., Oxford: Clarendon Press
  4. ^ a b c d e f g h i j k Diggle, James, et al., eds. (2021), The Cambridge Greek Lexicon, Cambridge: Cambridge University Press
  5. ^ Keersmaekers, Alek (2021–2025), GLAUx: The Greek Language Automated corpus, https://github.com/alekkeersmaekers/glaux
  6. ^ a b Bauer, Walter; Danker, Frederick W., et al. (2000), A Greek-English Lexicon of the New Testament and Other Early Christian Literature, 3rd ed., Chicago: University of Chicago Press
  7. ^ Kriaras, Emmanuel, Επιτομή του Λεξικού της μεσαιωνικής ελληνικής δημώδους γραμματείας 1100–1669, Κέντρο Ελληνικής Γλώσσας, https://www.greek-language.gr
  8. ^ a b Ινστιτούτο Νεοελληνικών Σπουδών (Ίδρυμα Μανόλη Τριανταφυλλίδη) (1998), Λεξικό της κοινής νεοελληνικής, Thessaloniki: Aristotle University of Thessaloniki
  9. ^ Πάπυρος–Larousse–Britannica, Μέγα Λεξικό της Ελληνικής Γλώσσας, Athens: Πάπυρος
Cite this entry

“Θεώρημα.” Etymologically, 13 Nov. 2026, etymologically.com/grc/%CE%B8%CE%B5%CF%8E%CF%81%CE%B7%CE%BC%CE%B1. Accessed 14 Nov. 2026.

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