Dictionary.com

backpressure

or back pres·sure

[ bak-presh-er ]
/ ˈbækˌprɛʃ ər /
Save This Word!

noun
a resistant pressure exerted by liquid or gas against the forward motion or flow of an exhaust or pipe system: Careful control of backpressure ensures an even supply of oil from the well.
QUIZ
ALL IN FAVO(U)R OF THIS BRITISH VS. AMERICAN ENGLISH QUIZ
There's an ocean of difference between the way people speak English in the US vs. the UK. Are your language skills up to the task of telling the difference? Let's find out!
Question 1 of 7
True or false? British English and American English are only different when it comes to slang words.

Origin of backpressure

First recorded in 1860–65; back1 + pressure
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for backpressure

back pressure

noun
engineering
  1. the pressure that opposes the motion of a piston on its exhaust stroke in an internal-combustion engine
  2. the exhaust pressure in external combustion engines
med the local pressure that builds up when fluid flow is obstructed in the cardiovascular or urinary systems
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
FEEDBACK