Definition of Rumination

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Rumination: 1. Regurgitating food after a meal and then swallowing and digesting some of it. Cattle and other ruminant animals have a four-chambered stomach for the rumination of food and so can chew their cud. Some people, particularly infants, engage in something similar by regurgitating food after a meal and then swallowing and digesting some of it. 2. 2. Preoccupation with certain obsessive thoughts.