out·​flow | \ ˈau̇t-ˌflō, ˌau̇t-ˈflō\
outflowed; outflowing; outflows

Definition of outflow

 (Entry 1 of 2)

intransitive verb

: to flow out


out·​flow | \ ˈau̇t-ˌflō \

Definition of outflow (Entry 2 of 2)

1 : a flowing out the outflow of dollars
2 : something that flows out outflow of a sewage treatment plant

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Synonyms & Antonyms for outflow

Synonyms: Noun

exodus, gush, outpour, outpouring

Antonyms: Noun

flux, inflow, influx, inrush

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Examples of outflow in a Sentence


We joined the outflow of fans from the stadium after the game. The vents provide improved outflow of air.

Recent Examples on the Web: Verb

This lets the structure breathe, and exchanges heat between incoming and outflowing air. Christopher Mims, WSJ, "Why Your Next Home Might Not Need Any Energy at All," 22 Dec. 2018 Heavy rains routinely overload Baltimore’s aged sewer system, sending human waste out of manholes and outflows that pour directly into the Jones Falls. Scott Dance, baltimoresun.com, "Weekend rain washes 10 million gallons of sewage-contaminated water into Baltimore's Jones Falls," 30 May 2018 The dam outflows below Wheeler and Wilson dams continue to produce some lunker smallmouths, with a fish over 8 pounds reported last week along with lots in the 4 to 5 pound class. Frank Sargeant, AL.com, "Friday Fishing Report," 30 Mar. 2018 And that doesn't account for the currents and outflowing tides that impeded him. Jon Wertheim, SI.com, "Sea of Dreams: How William Wrigley Jr. brought the Wrigley Ocean Marathon to life," 23 June 2017

Recent Examples on the Web: Noun

By the day of that gain, U.S. mutual and exchange-traded funds had seen net outflows of a little over $100 billion in just the preceding three weeks, according to the Investment Company Institute. Spencer Jakab, WSJ, "Stock-Market Standoff: Apple Warning vs. the Jobs Report," 4 Jan. 2019 That has put the region on pace for its first outflow in a calendar year since the financial crisis in 2008. Steven Russolillo, WSJ, "The Worst Redemptions on Record Add to Global Markets’ Pain," 18 Dec. 2018 Digital currencies also provide a way to move money out of China, potentially adding to outflows that officials have aggressively set about stemming. Fortune, "This Is How China Is Stifling Bitcoin and Cryptocurrencies," 17 Jan. 2018 But here’s the rub: These recent estimates from the Washington University study reveal a stark imbalance in the intake and the outflow. Jill Kiedaisch, Popular Mechanics, "Earth’s Crust Is Swallowing Way More Ocean Than We Thought," 15 Nov. 2018 Lamentably, the nearshore waters of this former French colony are chocolate rather than azure, muddied by outflow from the Amazon and other rivers. Eric Berger, Ars Technica, "As the SpaceX steamroller surges, European rocket industry vows to resist," 20 July 2018 The measure is a continuation of the company’s plan to slow its significant cash outflow, per recent subscription changes announced earlier this month. Nick Statt, The Verge, "MoviePass refunds annual subscribers as it further restricts member benefits," 24 Aug. 2018 These huge fund outflows show growing distaste for the U.S. dollar. Bloomberg.com, "Five Things You Need to Know to Start Your Day," 15 Mar. 2018 The rupee has fallen 16% since January on higher oil prices and an outflow of funds. Rajesh Roy, WSJ, "India’s Government Loses Patience With Central Bank," 31 Oct. 2018

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

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First Known Use of outflow


before the 12th century, in the meaning defined above


1785, in the meaning defined at sense 1

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Statistics for outflow

Last Updated

28 Dec 2018

Look-up Popularity

Time Traveler for outflow

The first known use of outflow was before the 12th century

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More Definitions for outflow



English Language Learners Definition of outflow

: an outward flow or movement of something

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More from Merriam-Webster on outflow

Rhyming Dictionary: Words that rhyme with outflow

Thesaurus: All synonyms and antonyms for outflow

Britannica English: Translation of outflow for Arabic Speakers

Britannica.com: Encyclopedia article about outflow

Comments on outflow

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tremendous in size, volume, or degree

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