digestion

noun

di·​ges·​tion dī-ˈjes-chən 

də-, 

-ˈjesh-

: the action, process, or power of digesting: such as

a

: the process of making food absorbable by mechanically and enzymatically breaking it down into simpler chemical compounds in the digestive tract

b

: the process in sewage treatment by which organic matter in sludge is decomposed by anaerobic bacteria with the release of a burnable mixture of gases

Examples of digestion in a Sentence

an enzyme that aids in the digestion of protein

She began to suffer from poor digestion as she grew older.

Recent Examples on the Web

Turning a lactose-digestion difference into a deficiency has done more to reinforce narratives of racial hierarchy than to improve public health. — Hilary Smith, The Conversation, 25 Aug. 2026

Traditional wool LCAs tally greenhouse gases, including methane from sheep digestion and nitrous oxide from manure and urine. — Alexandra Harrell, Footwear News, 21 Aug. 2026

This nutritional profile means sauerkraut may help promote healthier digestion, reduce inflammation, and support the immune system. — Amanda Doyle, HEALTH, 21 Aug. 2026

When blood sugar levels reach a certain threshold, a cascade of hormonal responses tells the pancreas to release insulin, slow digestion, and put a hold on the breakdown of glucose stores. — Mike McRae 19, New Atlas, 20 Aug. 2026

Word History

First Known Use

14th century, in the meaning defined above

Rhymes for digestion

• congestion
• ingestion
• suggestion
• gestion
• question
• indigestion

Kids Definition

digestion

noun

di·​ges·​tion dī-ˈjes-chən 

də-

: the process by which food is broken down into simpler forms in the body by mechanical and enzymatic means

Medical Definition

digestion

noun

di·​ges·​tion dī-ˈjes(h)-chən, də- 

: the action, process, or power of digesting

especially : the process of making food absorbable by mechanically and enzymatically breaking it down into simpler chemical compounds in the digestive tract