undefined

Fetched 2026-10-26 (cache).

Synonyms: unrefined, undefiled, undefine, undefied, defined, underived, undesired, undermined, unreined, undecided, redefined

Antonyms: unrefined, undefiled, undefine, undefied, defined, underived, undesired, undermined, unreined, undecided, redefined

Related words from Datamuse; suggestions, not definitions.

Adjective

1. Lacking a [[definition]] or [[value]].
2. {{lb|en|mathematics|computing}} That does not have a logically sound [[meaning]] within a specific [[formal system]] and is thus not assigned an [[interpretation]].
3. {{lb|en|computing}} That behaves unreliably due to dependence on an uninitialized value or inconsistently ported code.

Noun

1. {{lb|en|computing}} An [[#Adjective|undefined]] value.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.