To pronounce "undefined", say UND-ef-in-ed — 4 syllables. Tap play below to hear it in four English accents, or practice it syllable by syllable.
undefined
Tap to hear · American accent
Accent
If an accent sounds the same, your device is missing that voice — it falls back to the closest one.
Speed
Syllable by syllable — tap each one
Record yourself saying undefined, then compare with the target. Your audio stays on this device — nothing is uploaded.
4
Syllables
9
Letters
UND-ef-in-ed
Say it like
"undefined" has 4 syllables: und-ef-in-ed. It rhymes with refined and kind, if that helps it stick.
adjective
“The result of division by zero is undefined.”
Real example sentences from Tatoeba (CC-BY) — tap to hear each one, or see it used on YouGlish.
Practicing rhymes trains the same ending sounds.
"Undefined" has 4 syllables: und · ef · in · ed.
Undefined: Lacking a definition or value.
Want the definition, translations into 8 languages, and read-aloud for full sentences?
Open “undefined” in the full dictionary →