How do you pronounce "undefined"?

In American English: /ˌəndɪˈfaɪnd/ (uhnd-i-FEYEND). In British English: /ˌɐndɪfˈaɪnd/ (ɐnd-IF). In Canadian English: /ˌəndɪˈfaɪnd/ (uhnd-i-FEYEND). In Australian English: /ˌʌndɪfˈaɪnd/ (uhnd-if-EYEND).

Is "undefined" pronounced differently in American and British English?

Yes. In American English it's pronounced /ˌəndɪˈfaɪnd/ (uhnd-i-FEYEND), while in British English it's /ˌɐndɪfˈaɪnd/ (ɐnd-IF).

How to Pronounce "undefined"

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undefined

regional

/ˌəndɪˈfaɪnd/

uhnd-i-FEYEND

Syllable Breakdown

əndun·ɪde·faɪndfined

Source

90%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14