: 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 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 Plumbing system is not installed to preclude backflow.—Gege Reed, Louisville Courier Journal, 21 Nov. 2025 As the stomach works to pass food contents into the small intestine, there is an increased chance of heartburn – a backflow of acidic stomach contents that can cause a burning sensation in your chest or sour taste in your mouth.—Bryn Beeder, The Conversation, 17 Nov. 2025 See All Example Sentences for backflow