As a Noun: 1. When food passes through your body to your stomach, DIGESTION is the process of your stomach removing the substances that you need, and your body getting rid of the rest. Note: 1. There appears to be no commonly used Auslan sign for DIGESTION. If you know a sign for DIGESTION used by you or other Auslan users (deaf people or interpreters) please go to "missing sign feedback" and supply details. Thank you.