Etymology and origin of the Latin word decorum
- Confidence
- Established
- Formation
- Derivation
- First attested
- 81–43 BC Cicero More words from the 1st century BC
- Ultimate origin
- Latin decōrus
Etymology tree
From the same root
Forms
decōrum n (genitive decōrī); second declension[1]
Etymology
It is from Latin decōrus (“handsome, seemly”), used as a noun in the neuter.[2][3] The adjective is formed from decor (“beauty, grace”),[4] a noun which de Vaan takes to be formed productively to decet (“it is fitting”) and which gave the adjective its long ⟨ō⟩.[5] He traces the verb to Proto-Italic *dek-ē- (“fits, is right”) and Proto-Indo-European *deḱ-eh₁-.[5]
Earliest recorded meaning
As a noun it is found in Cicero, who uses it for what is fitting or becoming, the Latin name for what the Greeks called tò prépon.[2][6]
Semantic evolution
In Cicero it is a term of ethics and rhetoric, the seemliness that suits a person, a subject or an occasion;[2][6] Tacitus also has it.[6] Köbler's entry, which begins with Seneca, glosses it as becoming behaviour and grace.[7]
Polish medieval Latin used the plural for the ornaments of dress or of a building, and the word also for an honour or distinction.[8] English borrowed it in the 1560s for what is proper in a literary or artistic composition.[3] From the 1580s it also meant propriety of speech, behaviour or dress.[3] Italian decoro is a borrowing of it too.[1][9]
Timeline
- 81–43 BC – Cicero uses it as a noun for propriety.[2][6][7]
- 4 BC–65 AD – Seneca is Köbler's first author for it.[7]
- 1560s – English borrows it as decorum.[3]
Meanings
Noun
- What is fitting or becoming; propriety, seemliness.[10][2][6]
- Grace, comeliness.[7][11]
- (Medieval Latin, plural) Ornaments of dress or of a building.[8]
- (Medieval Latin) An honour, distinction.[8]
References
- ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
- ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
- ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
- ^ a b c d e Simpson, D. P. (1959), Cassell's New Latin Dictionary, London: Cassell
- ^ a b c d Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ a b c Lexicon mediae et infimae Latinitatis Polonorum (1953–), Kraków: Instytut Języka Polskiego PAN; electronic ed. elexicon.scriptores.pl
- ^ Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
- ^ Lewis, Charlton T. (1890), An Elementary Latin Dictionary, New York: American Book Company
- ^ Bianchi, Rossella; Lelli, Olga (2014), VOLI: Vocabolario di latino, Florence: Le Monnier
Cite this entry
“Decorum.” Etymologically, 7 Nov. 2026, etymologically.com/la/decorum. Accessed 8 Nov. 2026.
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