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

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

The International Joint Commission can control outflow in the Great Lakes only from Superior and Ontario. Laura Johnston, cleveland.com, "Lake Erie breaks all-time high water record," 3 June 2019 Offshore investors ditched a net 11.5 billion rand ($898 million) of South African bonds last week, bringing outflows this year 8.4 billion rand. Colleen Goko, Bloomberg.com, "South African Rand Is Back to Its Bad Old Way," 21 May 2018 Och-Ziff isn’t the only hedge-fund firm wrestling with investor outflows and uneven performance. Kimberly Chin, WSJ, "Daniel Och Takes Another Step Back From The Hedge Fund Empire He Built," 6 Dec. 2018 Gaming in Hainan would divert the torrent of gambling-loving Chinese away from these rival hubs, while limiting capital outflow and ensuring gaming revenue stays in the mainland economy. Bloomberg.com, "Property, Travel Stocks Soar After China Announces Measures to Develop Hainan," 16 Apr. 2018 But even Fidelity funds that are open to new investors, like its largest actively managed offering, the $124 billion Contrafund, are experiencing consistent outflows — $26.2 billion in the Contrafund alone since 2011, according to Morningstar. New York Times, "Fidelity, Bruised From Crises, Searches for Life After Mutual Funds," 27 May 2018 Attach the ½-inch adapter included with the pump to the pump's outflow and place it in the reservoir. Daniel Kluko, Popular Mechanics, "How to Grow Hydroponic Plants at Home," 13 Feb. 2017 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

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

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

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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

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