blow-by

or blow·by

[ bloh-bahy ]
/ ˈbloʊˌbaɪ /

noun, plural blow-bies. Automotive.

leakage of the air-fuel mixture or of combustion gases between a piston and the cylinder wall into the crankcase of an automobile.
a device, fitted to a crankcase, for conducting such gases back to the cylinders for combustion.

Nearby words

  1. blow someone to,
  2. blow the lid off,
  3. blow the whistle on,
  4. blow through,
  5. blow up,
  6. blow-by-blow,
  7. blow-comb,
  8. blow-dry,
  9. blow-dryer,
  10. blow-fly

Origin of blow-by

First recorded in 1930–35; noun use of verb phrase blow by

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


British Dictionary definitions for blow by

blow-by

noun

the leakage of gas past the piston of an engine at maximum pressure
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