Definition of backflow in English:

backflow

Line breaks: back|flow
Pronunciation: /ˈbakfləʊ
 
/

noun

[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.

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Word of the day internecine
Pronunciation: ˌɪntəˈniːsʌɪn
adjective
destructive to both sides in a conflict