Vomit/ˈvɑːmɪt/ Definition 1 of 3Pro Tip 1/3Informal Speech Used mostly in informal conversations or when describing medical conditions. During the rough sea voyage, many passengers started to vomit. Pro Tip 2/3Emotional Intensity Can express a strong, involuntary reaction of disgust or repulsion. The sight was so horrific I felt I might vomit. Pro Tip 3/3Sensitive Topic Talking about vomit may be considered rude or unpleasant in some social contexts. Sorry, I don't want to talk about vomit while we're eating.