1. A quick reflex inspiration suddenly checked by closure of the glottis producing an audible sound; SYN. hiccough, singultus.
2. (Usually plural) The state of having involuntary spasms of the diaphragm accompanied by a rapid closure of the glottis; sometimes a symptom of indigestion; SYN. hiccough.
Sharp noise caused by a sudden spasm of the diaphragm with closing of the windpipe, commonly caused by digestive disorder. On rare occasions, hiccups may become continuous, when they are very debilitating; treatment with a muscle relaxant drug may be effective.

To breathe spasmodically, and make a sound; SYN. hiccough.