backflow

noun

back·​flow ˈbak-ˌflō How to pronounce backflow (audio)
: a flowing back or returning especially toward a source

Examples of backflow in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The back-of-house hose was found incorrectly attached with no backflow preventor or air gap, causing potential dirty water to come back up from the sink. Paige Moore, AZCentral.com, 1 Apr. 2026 At mop sink, backflow preventer missing on non chemical dispenser side of splitter with red hose attached. Staff Reports, Florida Times-Union, 24 Mar. 2026 The facility lacked a backflow prevention device in the mop sink. Veronica Fernandez-Alvarado february 13, Sacbee.com, 13 Feb. 2026 This also results in a loss of water pressure within the distribution system, and that could lead to contamination entering the system through backflow or back siphonage. Patrick Damp, CBS News, 7 Feb. 2026 See All Example Sentences for backflow

Word History

First Known Use

1878, in the meaning defined above

Time Traveler
The first known use of backflow was in 1878

Browse Nearby Words

Cite this Entry

“Backflow.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/backflow. Accessed 21 May. 2026.

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