the reflex act of ejecting the contents of the stomach through the mouth
"After eating too much spicy food, he felt his body's violent reaction to eject everything from his stomach through his mouth."
The act of one who vomits, or the matter that is vomited.
"After eating spoiled fish, he spent hours dealing with his severe vomiting on the floor."
present participle of vomit
"The patient was admitted to the hospital after being found vomiting all night long."