Etymologically

indefinitus

Etymology and origin of the Latin word indefinitus

Confidence
Established
Formation
Derivation
First attested
c. 165 Aulus Gellius More words from the 2nd century
Ultimate origin
Latin dēfīnītus
Etymology tree
inherited borrowed derived
Latin fīnis
French fin
Italian fine
Italian fino
Spanish fin
Latin fīniō
French finir
Italian finire
Latin dēfīniō
English define
Latin dēfīnītus
English definite
Latin indēfīnītus
English indefinite
From the same root
Latin affīnis ← fīnis
Latin cōnfīnis ← fīnis
Latin fīnālis ← fīnis
Latin fīnitimus ← fīnis
Latin fīnus ← fīnis
Latin īnfīnitās ← fīnis
French enfin ← fin
Italian finché ← fino
Italian finora ← fino
Italian perfino ← fino
Spanish fino ← fin
Latin fīnītiō ← fīniō
Latin fīnītīvus ← fīniō
Latin fīnītor ← fīniō
Latin fīnītus ← fīniō
Latin praefiniō ← fīniō
Italian finito ← finire
Latin dēfīnītiō ← dēfīniō
Latin dēfīnītīvus ← dēfīniō
English redefine ← define

Pronunciation

  • Classical: [ɪn.deː.fiːˈniː.tʊs][1]
  • Ecclesiastical: [in.de.fiˈniː.tus][1]

Forms

indēfīnītus (feminine indēfīnīta, neuter indēfīnītum); first/second-declension adjective[1]

Etymology

It is from Latin in-2 (“not”) + dēfīnītus (“definite”).[2][3][1]

Earliest recorded meaning

Aulus Gellius (c. 165 AD) is the first certain source: a discussion becomes endless, he says, unless it is limited by simple questions and answers.[2][3][4] The TLL notes that a fragment of Cicero has it only by an editor's conjecture.[3]

Semantic evolution

Gellius also uses it in grammar for the infinitive mood, in Greek ἀπαρέμφατος (aparémphatos).[2] Hilary of Poitiers, Augustine and Gregory the Great use it of what is indeterminate, uncertain or without limit, such as an indefinite number.[3] In medieval Latin it rendered ἀόριστος (aóristos) and was used in grammar and philosophy of what is not limited or determined;[5] it is sometimes confused with infinitus.[5]

English indefinite (1520s) comes from it.[6]

Timeline

  • c. 165 AD – Aulus Gellius uses it of an endless discussion and of the infinitive mood.[2][4]
  • c. 315–367/368 AD – Hilary of Poitiers uses it of an indefinite number.[3][4]
  • 354–430 AD – Augustine uses it.[3][4]
  • 1520s – English borrows it as indefinite.[6]

Meanings

Adjective

  1. Unlimited, endless; indefinite, indeterminate.[2][3][7]
  2. (grammar) Belonging to the infinitive mood.[2]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e f g Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  4. ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  5. ^ a b Mittellateinisches Wörterbuch bis zum ausgehenden 13. Jahrhundert (1967–), Munich: C. H. Beck; Bayerische Akademie der Wissenschaften
  6. ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  7. ^ Stelten, Leo F. (1995), Dictionary of Ecclesiastical Latin, Peabody, Mass.: Hendrickson
Cite this entry

“Indefinitus.” Etymologically, 7 Nov. 2026, etymologically.com/la/indefinitus. Accessed 8 Nov. 2026.

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