in·​flu·​ent | \ ˈin-ˌflü-ənt How to pronounce influent (audio) , in-ˈflü-\

Definition of influent

 (Entry 1 of 2)

: flowing in



Definition of influent (Entry 2 of 2)

1 : something that flows in: such as
a : a tributary stream
b : fluid input into a reservoir or process
2 : a factor modifying the balance and stability of an ecological community

Keep scrolling for more

Synonyms & Antonyms for influent

Synonyms: Noun

affluent, bayou, branch, confluent, feeder, tributary

Antonyms: Noun

distributary, effluent

Visit the Thesaurus for More 

Examples of influent in a Sentence


along with its influents, the Missouri and Ohio rivers, the Mississippi River drains all or part of 31 U.S. states and two Canadian provinces

Recent Examples on the Web: Noun

The influent flow is slowed to allow human and food organic waste to settle on the bottom of the tank. The Seattle Times, "How West Point processes Seattle's sewage," 29 Apr. 2017

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

First Known Use of influent


15th century, in the meaning defined above


1859, in the meaning defined at sense 1

Keep scrolling for more

Learn More about influent

Statistics for influent

Look-up Popularity

Time Traveler for influent

The first known use of influent was in the 15th century

See more words from the same century

More from Merriam-Webster on influent

Rhyming Dictionary: Words that rhyme with influent

Thesaurus: All synonyms and antonyms for influent

Comments on influent

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


providing supplementary assistance

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Syn City

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

Love words? Need even more definitions?

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