out·​flow | \ ˈau̇t-ˌflō How to pronounce outflow (audio) , ˌau̇t-ˈflō \
outflowed; outflowing; outflows

Definition of outflow

 (Entry 1 of 2)

intransitive verb

: to flow out


out·​flow | \ ˈau̇t-ˌflō How to pronounce outflow (audio) \

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

Antonyms: Noun

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Examples of outflow in a Sentence

Noun 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 Both of the new creations — Standard Life Aberdeen Plc and Janus Henderson Group Plc — have suffered big customer outflows in the quarters following their transformations. Washington Post, "Asset Management Is in Trouble If This Is Its Proposed Salvation," 29 Nov. 2019 The audit found that a massive exfiltration of data from Mr. Bezos’ device began hours after receiving the encrypted video file from Prince Mohammed, with the amount of outflowing data surging by nearly 30,000% and continuing for months. Justin Scheck, WSJ, "U.N. Suggests Bezos’ Phone Was Hacked Using Saudi Crown Prince’s Account," 23 Jan. 2020 Storms in eastern and southern Arizona began to die out and outflow winds from those decaying storms collided and pushed up massive walls of dust in the desert south of Phoenix. Weldon B. Johnson, azcentral, "Arizona's biggest weather stories of the past 10 years: Heat, floods and dust storms," 30 Dec. 2019 In a dry month, outflows through the canal can reduce the lake’s level by 80cm. The Economist, "Climate change threatens the Panama Canal," 19 Sep. 2019 Regulators appear more confident that years of regulatory measures will keep hot money outflows manageable. John Authers | Bloomberg, Washington Post, "China Has a Big Currency Decision to Make," 21 May 2019 However, the hydrogen and helium gas on WASP-121b is outflowing, akin to a river, dragging the metals with them, Sing continued. Fox News, "NASA discovers 'extreme' alien planet that's shaped like a football," 2 Aug. 2019 But there are concerns that in a stressed market, outflows from ETFs might make a bad situation worse. The Economist, "Why everybody is concerned about corporate-bond liquidity," 11 July 2019 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 Recent Examples on the Web: Noun Compare that with New York and Chicago, which are losing population, and with California, which continues to see a net outflow of middle-class residents to cheaper cities beyond its borders. Conor Dougherty, New York Times, "The Capital of Sprawl Gets a Radically Car-Free Neighborhood," 31 Oct. 2020 The outflow coincided with inflows into sectors including materials and utilities, Bank of America said. Caitlin Mccabe, WSJ, "Value Stocks Are Outperforming Growth—at Least for Now," 30 Sep. 2020 Another explanation is biological: The region’s phytoplankton might be less capable than their Atlantic counterparts at staunching the CO2 outflow. Paul Voosen, Science | AAAS, "Fleet of robotic probes will monitor global warming’s impact on microscopic ocean life," 29 Oct. 2020 The state of emergency serves to block an outflow of people from Madrid for the long-weekend, with a Monday holiday in Spain -- likely further fraying already strained nerves among residents. Rudy Ruitenberg, Bloomberg.com, "Merkel Sounds Alert With Virus Resurgent in Europe’s Cities," 9 Oct. 2020 In late July, Di Maio threatened to withhold development aid to Tunisia until authorities agreed on a plan to stem the outflow. Washington Post, "Economic fallout from coronavirus leads to surge in Tunisians leaving for Europe," 24 Sep. 2020 Although the latest data only extends through July, the conditions that resulted in the outflow of immigrants have improved slowly at best. Laurence Darmiento Staff Writer, Los Angeles Times, "As jobs vanished, immigrants left California. The question is how many," 16 Oct. 2020 Foreigners turned net buyers of South African stocks on Thursday, ending a nine-day net outflow. Adelaide Changole, Bloomberg.com, "South Africa Stocks Fall as Trump’s Positive Test Spooks Markets," 2 Oct. 2020 Boeing could see a staggering $23.3 billion cash outflow this year, according to Melius Research analyst Carter Copeland, before the resumption of Max deliveries starts to fill the company’s coffers in 2021. Julie Johnsson, Bloomberg.com, "Boeing Snubs Seattle to Consolidate 787 Output in South Carolina," 1 Oct. 2020

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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Time Traveler for outflow

Time Traveler

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

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Cite this Entry

“Outflow.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/outflow. Accessed 25 Nov. 2020.

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More Definitions for outflow


How to pronounce outflow (audio)

English Language Learners Definition of outflow

: an outward flow or movement of something

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More from Merriam-Webster on outflow

Thesaurus: All synonyms and antonyms for outflow

Britannica English: Translation of outflow for Arabic Speakers

Britannica.com: Encyclopedia article about outflow

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