1. The act or process of ruminating, or chewing the cud; the habit of chewing the cud. Rumination is given to animals to enable them at once to lay up a great store of food, and afterward to chew it. (Arbuthnot)
2. The state of being disposed to ruminate or ponder; deliberate meditation or reflection. Retiring full of rumination sad. (Thomson)
3. (Science: physiology) The regurgitation of food from the stomach after it has been swallowed, occasionally oberved as a morbid phenomenon in man.
Origin: L. Ruminatio: cf. F. Rumination.