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

Hypothesizing a possible explanation for the link between higher sugar substitute intake and accelerated cognitive decline, the researchers posited that sugar substitutes might produce toxic metabolites during digestion, which, in turn, have a damaging effect. —Caroline Tien, SELF, 27 Feb. 2026

Some apples contain slightly more fiber than others, but all varieties support digestion and heart health. —Maggie O'Neill, Verywell Health, 27 Feb. 2026

Oral versions of these drugs need to be given in much higher doses than injectable versions to withstand digestion. —Lauren J. Young, Scientific American, 26 Feb. 2026

For a gentler impact on digestion and blood sugar, try having kombucha with or after meals or snacks. —Trista Chan, Health, 26 Feb. 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