Definition from Wiktionary, the free dictionary
Alternative forms 
hiccup (plural hiccups)
- 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 minor setback.
- There's been a slight hiccup in the processing of this quarter's results
spasm of the diaphragm
See also 
- To have the hiccups.