digestion

noun

di·​ges·​tion dī-ˈjes-chən How to pronounce digestion (audio)
də-, 
-ˈjesh-
Synonyms of digestionnext
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Protein helps slow digestion, preventing post-meal blood sugar spikes. — Jillian Kubala, HEALTH, 23 Oct. 2026 The trend is spreading across TikTok and Instagram, with creators promising steadier blood sugar, better digestion and even weight loss support. — Hanna Wickes, Kansas City Star, 21 Oct. 2026 When released under conditions of acute stress, glucocorticoids power fight or flight by shunting metabolic energy away from processes such as digestion and toward the heart, lungs, brain and muscles. — Maia Szalavitz, Scientific American, 20 Oct. 2026 From probiotics and prebiotics to digestion and smart food pairings, here’s how sourdough actually fits into a gut-friendly routine. — Ryan Brennan, Miami Herald, 20 Oct. 2026 See All Example Sentences for digestion

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of digestion was in the 14th century

Browse Nearby Words

Cite this Entry

“Digestion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/digestion. Accessed 27 Oct. 2026.

Kids Definition

digestion

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

Medical Definition

: 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

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