Dictionary.com
Thesaurus.com
Synonyms

backflow

American  
[bak-floh] / ˈbækˌfloʊ /

noun

  1. a flow of a liquid opposite to the usual or desired direction.


Etymology

Origin of backflow

First recorded in 1880–85; back 2 + flow

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The water that flows through the pipes to us is made safe in part by physics—a pressure loss can lead to backflow of groundwater, sewage, and soil contaminants.

From Slate ● Aug. 19, 2026

In Ventura County, flooding damaged roads, bridges, levees and park facilities, inundating the Ventura Wastewater Facility and causing water to backflow into the system, Newsom wrote.

From Los Angeles Times ● Apr. 14, 2024

They might also trigger backflow valve inspection requirements, such as those required for irrigation systems in many areas.

From Seattle Times ● Apr. 5, 2023

Götherström agrees that repeated backflow is the most likely scenario given the available evidence.

From Science Magazine ● Jan. 11, 2023

This was to prevent a backflow of contaminated air from coming into the staging room.

From "The Hot Zone" by Richard Preston

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training