Indigestion/ˌɪndɪˈdʒestʃən/ Definition 1 of 1Pro Tip 1/3Physical Discomfort Indigestion refers to physical discomfort, not emotional problems. After eating too fast, he complained of indigestion. Pro Tip 2/3Eating Habits Indigestion often relates to overeating or eating problematic foods. Eating spicy food can sometimes lead to indigestion. Pro Tip 3/3Common Occurrence Indigestion is a common condition, not a serious disease, in everyday language. It's not unusual to have indigestion after a festive dinner.