undefined

adjective
UK: /ˌʌndɪˈfaɪnd/
US: /ˌʌndɪˈfaɪnd/

  1. Not clearly or exactly known or stated.

    1. The future is undefined, so we must prepare for anything.
    2. The contract left several key terms undefined, leading to later disputes.

  2. Not having a clear shape or form.

    1. The fog created an undefined shape in the distance.
    2. The painter used soft edges to create an undefined and dreamlike quality.

  3. (In programming) A variable that has been declared but has not been assigned a value.

    1. The variable remained undefined, causing an error in the script.
    2. If the input is missing, the result will be undefined and handled accordingly.

Synonyms

unclear imprecise ambiguous indeterminate vague

Frequently Asked Questions

The word "undefined" in English means: Not clearly or exactly known or stated., Not having a clear shape or form., (In programming) A variable that has been declared but has not been assigned a value..

The phonetic transcription of "undefined" is /ˌʌndɪˈfaɪnd/ in British English and /ˌʌndɪˈfaɪnd/ in American English. Click the 🔊 button to hear both pronunciations.

Synonyms for "undefined": unclear, imprecise, ambiguous, indeterminate, vague.

Example usage of "undefined": "The future is undefined, so we must prepare for anything.". More examples on the page.