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[uhn-di-fahynd] /ˌʌn dɪˈfaɪnd/
without fixed limits; indefinite in form, extent, or application:
undefined authority; undefined feelings of sadness.
not given meaning or significance, as by a definition; not defined or explained:
an undefined term.
1605-15; un-1 + defined
Related forms
[uhn-di-fahy-nid-lee, -fahynd-] /ˌʌn dɪˈfaɪ nɪd li, -ˈfaɪnd-/ (Show IPA),
undefinedness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for undefined
  • What was interesting was that the characters were kind of undefined in the original script.
  • Similarly, the use of undefined pronouns is irksome when they refer to an earlier message.
  • And the etiology for this mental disorder was often undefined.
  • Ask them what zero divided by zero is and they will say undefined.
  • Despite its fierce campaign of violence, the group has an undefined structure and no clear chain of command.
  • But failure of some lesser sort, still undefined, looks increasingly inevitable.
  • The results are undefined if the calling thread holds the lock at the time the call is made.
  • If a thread terminates while it has ownership of a critical section, the state of the critical section is undefined.
  • Some therapies or procedures fall under the undefined scope of practice rather than as a trial study.
British Dictionary definitions for undefined


not defined or made clear: the job has remained undefined
Derived Forms
undefinable, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for undefined

1610s, from un- (1) "not" + past participle of define (v.).

Online Etymology Dictionary, © 2010 Douglas Harper
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