| Noun | 1. | gastritis - inflammation of the lining of the stomach; nausea and loss of appetite and discomfort after eating inflammation, redness, rubor - a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat acute gastritis - gastritis caused by ingesting an irritant (as too much aspirin) chronic gastritis - persistent gastritis can be a symptom of a gastric ulcer or pernicious anemia or stomach cancer or other disorders |