digestion

noun di·ges·tion \ dī-ˈjes-chən , də- , -ˈjesh- \
|Updated on: 21 Aug 2018

Definition of digestion

: 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

  1. an enzyme that aids in the digestion of protein

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

Recent Examples of digestion from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'digestion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of digestion

14th century

in the meaning defined above

See Words from the same year
NEW! Time Traveler

DIGESTION Defined for English Language Learners

digestion

Definition of digestion for English Language Learners

  • : the process by which food is changed to a simpler form after it is eaten


DIGESTION Defined for Kids

digestion

noun di·ges·tion \ dī-ˈjes-chən , də- \

Definition of digestion for Students

: the body's process or power of changing food into simpler forms that can be taken up and used

Medical Dictionary

digestion

noun di·ges·tion \ dī-ˈjes(h)-chən, də- \

medical Definition of digestion

: 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


Seen and Heard

What made you want to look up digestion? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

resembling the blue of the sky

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet-pasta-spelling-help
  • Which is the correct spelling?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!