未定義の形容詞：意味、語源など

undefined, adj. meanings, etymology and more | Oxford English Dictionary Skip to main content Factsheet Etymology Meaning & use Pronunciation Frequency Compounds & derived words Dictionary Historical Thesaurus Factsheet Quotations Hide all quotations Factsheet What does the adjective undefined mean? There is one meaning in OED's entry for the adjective undefined . See ‘Meaning & use’ for definition, usage, and quotation evidence. Entry status OED is undergoing a continuous programme of revision to modernize and improve definitions. This entry has not yet been fully revised. See meaning & use How common is the adjective undefined ? About 2 occurrences per million words in modern written English 1750 0.3 1760 0.38 1770 0.53 1780 0.84 1790 1.0 1800 1.3 1810 1.5 1820 1.9 1830 2.2 1840 2.3 1850 2.3 1860 2.2 1870 2.1 1880 2.0 1890 1.7 1900 1.5 1910 1.3 1920 1.3 1930 1.3 1940 1.4 1950 1.5 1960 1.7 1970 1.9 1980 2.0 1990 1.9 2000 1.8 2010 1.7 See frequency What is the etymology of the adjective undefined ? undefined is formed within English, by derivation. Etymons: un- prefix 1 2 , define v. , ‑ed suffix 1 . See etymology What is the earliest known use of the adjective undefined ? Earliest known use early 1600s The earliest known use of the adjective undefined is in the early 1600s. OED's earliest evidence for undefined is from 1611, in the writing of John Florio, author and teacher of languages. See meaning & use How is the adjective undefined pronounced? British English /ˌʌndᵻˈfʌɪnd/ un-duh-FIGHND U.S. English /ˌəndəˈfaɪnd/ un-duh-FIGHND /ˌəndiˈfaɪnd/ un-dee-FIGHND See pronunciation Nearby entries undefensable, adj. c1412–1642 undefensible, adj. 1529– undefensive, adj. 1587 undeferentially, adv. 1876– undeficient, adj. 1854– undefied, adj.¹ 1398–1450 undefied, adj.² 1590– undefilable, adj. 1854– undefiled, adj. c1400– undefinable, adj. & n. 1690– undefined, adj. 1611– undefinite, adj. 1589–1603 undeflected, adj. 1852– undeflore, adj. 1568 undeflowered, adj. a1533– undefoiled, adj. a1325 undefoiling, n. c1425 undeformed, adj. 1673– undefouled, adj. c1374–1483 undefoulingness, n. c1400 undefrayed, adj. 1611– Browse more nearby entries Etymology Thank you for visiting Oxford English Dictionary To continue reading, please sign in below or purchase a subscription. After purchasing, please sign in below to access the content. 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View our subscription options Personal account Access or purchase personal subscriptions Get our newsletter Save searches Set display preferences Sign in Register Institutional access Sign in through your institution Sign in with library card Sign in with username / password Recommend to your librarian Institutional account management Sign in as administrator on Oxford Academic Entry history for undefined, adj. undefined, adj. was first published in 1921; not fully revised. undefined, adj. was last modified in December 2025. Revision of the OED is a long-term project, and oed.com is a living text, updated every three months. Entries which have not been fully revised may include partial interim updates, including: corrections and revisions to definitions, especially to improve clarity, accuracy, or intelligibility; new or updated quotation evidence, and reverified or redated bibliographical information; new or updated pronunciations (transcriptions and audio files); new or revised etymological information and improved coverage of variant spellings; new senses or phrases added in print and online updates since OED2 (1989). Revisions and additions of this kind were last incorporated into undefined, adj. in December 2025. Earlier versions of this entry were published in: OED First Edition (1921) Find out more OED Second Edition (1989) Find out more View undefined, ppl. a. in OED Second Edition Cite Permanent link: Chicago 18 Oxford English Dictionary , “ ,” , . Copy to clipboard Copied to clipboard MLA 9 “ ” Oxford English Dictionary , Oxford UP, , . Copy to clipboard Copied to clipboard APA 7 Oxford University Press. (n.d.). In Oxford English dictionary . Retrieved , from Copy to clipboard Copied to clipboard Select format to download citation .ris (Papers, Zotero) .enw (EndNote) .txt (RefWorks) Download Contribute Please submit your feedback for undefined, adj. Please include your email address if you are happy to be contacted about your feedback. OUP will not use this email address for any other purpose. Section (required) Factsheet Etymology Meaning & use Pronunciation Frequency Compounds & derived words Other Feedback (required) Submit Citation details Factsheet for undefined, adj. Browse entry Nearby entries undefensable, adj. c1412–1642 undefensible, adj. 1529– undefensive, adj. 1587 undeferentially, adv. 1876– undeficient, adj. 1854– undefied, adj.¹ 1398–1450 undefied, adj.² 1590– undefilable, adj. 1854– undefiled, adj. c1400– undefinable, adj. & n. 1690– undefined, adj. 1611– undefinite, adj. 1589–1603 undeflected, adj. 1852– undeflore, adj. 1568 undeflowered, adj. a1533– undefoiled, adj. a1325 undefoiling, n. c1425 undeformed, adj. 1673– undefouled, adj. c1374–1483 undefoulingness, n. c1400 undefrayed, adj. 1611– Browse more nearby entries