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

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Synonyms & Antonyms for influent

Synonyms: Noun

Antonyms: Noun

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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

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Time Traveler for influent

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

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Last Updated

30 Apr 2020

Cite this Entry

“Influent.” Dictionary, Merriam-Webster, Accessed 3 Jun. 2020.

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