Home › Words › U › unfulfillmentunfulfillment/ənfəlˈfɪlmənt/unfulfillment means the failure to fulfill or perform something.unfulfillment is pronounced /ənfəlˈfɪlmənt/.EtymologyFrom un- + fulfill + -ment.nounThe failure to fulfill or perform something.Definitions & examples from Wiktionary (CC BY-SA 3.0).