The meaning of UNDEFINED is not defined. How to use undefined in a sentence.

UNDEFINED definition: 1. not clearly described, stated, or known: 2. not having been given a definition (= a statement…. Learn more.

Jul 8, 2025 · A variable that has not been assigned a value is of type undefined. A method or statement also returns undefined if the variable that is being evaluated does not have an assigned value.

UNDEFINED definition: without fixed limits; indefinite in form, extent, or application. See examples of undefined used in a sentence.

Look up undefined in Wiktionary, the free dictionary.

Definition of 'undefined' undefined in British English (ˌʌndɪˈfaɪnd ) adjective not defined or made clear

Definition of undefined adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

1. not defined or explained. 2. indefinite in form or extent: an undefined feeling of sadness.

1 ENTRIES FOUND: undefined (adjective) undefined /ˌʌndɪ ˈ faɪnd/ adjective Britannica Dictionary definition of UNDEFINED : not shown or described clearly

5 days ago · (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation. The result of division by zero is undefined.