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

Antonyms: Noun

Visit the Thesaurus for More 

Examples of influent in a Sentence

Noun 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: Adjective The consortium intends to gauge the scale of infection in a population by collecting and examining influent samples from municipal wastewater treatment plants in several countries including in India. Sahana Ghosh, Quartz India, "Can human poop help track the spread of coronavirus in Indian localities?," 15 Apr. 2020 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

Time Traveler for influent

Time Traveler

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

See more words from the same century

Statistics for influent

Cite this Entry

“Influent.” Dictionary, Merriam-Webster, Accessed 8 May. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on 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).


Test Your Vocabulary

Star Wars Words Quiz

  • cu jedi training
  • The bounty portion of bounty hunters (such as Boba Fett) comes from a Latin word meaning
Spell It

Can you spell these 10 commonly misspelled words?

 AlphaBear 2

Spell words. Make bears.

Love words? Need even more definitions?

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