\Di*gest"er\, n. 1. One who digests. 2. A medicine or an article of food that aids digestion, or strengthens digestive power. Rice is . . . a great restorer of health, and a great digester. --Sir W. Temple. 3. A strong closed vessel, in which bones or other substances may be subjected, usually in water or other liquid, to a temperature above that of boiling, in order to soften them.