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.

Look up undefined in Wiktionary, the free dictionary.

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

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

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

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

Nov 1, 2025 · (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation. The result of division by zero is undefined.

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