undefined
undefined adjective: lacking a definition or value.
Adjective
undefined (not comparable)
- Lacking a definition or value.
- We slid into our office, past two women discussing the "X factor," an apparently undefined quality their firm felt they lacked.1992, Lia Matera, Prior Convictions, page 121
- Synonyms:
- indefinite
- That does not have a logically sound meaning within a specific formal system and is thus not assigned an interpretation.
- The result of division by zero is undefined.
- Within the set of real numbers, the square root of a negative number is undefined.
- That behaves unreliably due to dependence on an uninitialized value or inconsistently ported code.
- In C, relying on a variable's value right after a malloc call is undefined behvaior.
Noun
undefined (plural undefineds)
- An undefined value.
- [Option:] · [PDP11:] F [BSD:] · [XE 2.3:] [1] [XE 3.0:] · [SIII:] · [COFF:] · [meaning:] make undefineds global1987, J. E. Lapin, Portable C and UNIX System Programming (Prentice-Hall Software Series), Englewood Cliffs, N.J.: Prentice-Hall, Inc., →ISBN, page 72
- Every operation is defined completely either by delivering a value of some type depending only on the types of its operands or by causing some defined exception; there are no ‘undefineds’ in Ten15.1988, Pearl Brereton, editor, Software Engineering Environments, Chichester, West Sussex: Ellis Horwood Limited, →ISBN, page 230
undefined meaning in Hindi, Tamil, Marathi and Urdu
undefined in Hindi
- अव्याख्यायित
undefined in Tamil
- வரையறுக்கப்படாத, வரையறுக்கப்படாதது
undefined in Marathi
- अनिर्धारित
undefined in Urdu
- غیرمحدود, غیرمعین, غیرواضح
More languagesFewer languages
- undefined in Bengali
- অনির্দিষ্ট, অবর্ণিত, অনির্ণীত, অনিয়ত
- undefined in Telugu
- నిర్వచించబడనిది
- undefined in Malayalam
- നിർവ്വചിക്കാത്ത, നിർവചിക്കപ്പെടാത്ത, പ്രത്യേകം നിർദ്ദേശിക്കപ്പെടാത്ത, വകുപ്പുതിരിച്ചു വിവരം നല്കപ്പെടാത്ത
- undefined in Gujarati
- અવ્યાખ્યાયિત
- undefined in Nepali
- अव्याख्यायित, अनिर्धारित
- undefined in Vietnamese
- không xác định
Examples of undefined in a sentence
- We've added hooks to allow undefined message types to be handled with custom code.
- If not defined elsewhere, the sequence of evaluation of an expression is undefined.
- But, even in the design of these new media strategies, many experiences consumers are having are vague, disjointed, or undefined.
Synonyms of undefined
Antonyms
Forms of undefined
| plural | undefineds |
|---|
Origin of undefined
From un- + defined.
Words formed from undefined
- undefined behavior
- undefinedly
- undefinedness
Questions about undefined
- What does undefined mean?
- Undefined means lacking a definition or value.
- What is undefined in Hindi?
- Undefined in Hindi is अव्याख्यायित. See Undefined meaning in Hindi.
- What part of speech is undefined?
- Undefined can be an adjective or a noun.
Words near undefined in the dictionary
Source and license
Adapted from Wiktionary: undefined (page history and authors); undefined (Hindi, IndicTrans2 machine translation) (model and license); undefined (Tamil, IndicTrans2 machine translation) (model and license); undefined (Marathi, IndicTrans2 machine translation) (model and license); undefined (Urdu Wiktionary) (page history and authors); undefined (Bengali Wiktionary) (page history and authors); undefined (Telugu, IndicTrans2 machine translation) (model and license); undefined (Olam, E.K. Kurup corpus) (dataset and license); undefined (Gujarati, IndicTrans2 machine translation) (model and license); undefined (Nepali, IndicTrans2 machine translation) (model and license). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
Last updated:
Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Flame, not lame-undefined.wav.
Cite this entry: “undefined.” Word.ws, https://word.ws/undefined. Based on Wiktionary, CC BY-SA 4.0.