Share this entry

backflow Line breaks: back|flow
Pronunciation: /ˈbakfləʊ/

Definition of backflow in English:


[mass noun]
The movement of liquid or air back in the direction it was flowing from: when filling the tank, use an anti-siphon device to prevent backflow the valves prevent backflow of blood into the veins
More example sentences
  • Patients who have taken those drugs may have changes in their heart valves that cause leakiness and backflow of blood.
  • Incorrectly installed systems can waste water and care must be taken not to contaminate mains water supplies through backflow.
  • Veins in the legs have valves which normally prevent any backflow of the blood on its way towards the heart.

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources