hiccup /ˈhɪkʌp/noun 4verb 3forms 5 noun4 •A spasm of the diaphragm, or the resulting sound.There was a loud hiccup from the back of the room and the class erupted in laughter. •A case of the hiccups; the condition of having the spasms of hiccupping; singultus; diaphragmatic myoclonus. •(informal) A minor obstacle or setback.There's been a slight hiccup in the processing of this quarter's results. •Any spasm or sudden change.Albert didn't notice the switch, the subliminal flash and hiccup in time as the man he had been talking to only seconds before was catapulted backwards half an hour. — 2010 verb3 •To produce a hiccup; have the hiccups. •To produce an abortive sound like a hiccup.The car engine hiccupped but wouldn't start. •To say with a hiccup."I haven't touched a drop, officer," the suspect hiccupped. formshiccuped · hiccupped · hiccuping · hiccupping · hiccups