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spark gap

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noun Electricity.
a space between two electrodes, across which a discharge of electricity may take place.
the electrodes and the space between, considered as a unit: used in ignition systems.
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Origin of spark gap

First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use spark gap in a sentence

British Dictionary definitions for spark gap

spark gap

noun
the space between two electrodes across which a spark can jumpSometimes shortened to: gap
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

Scientific definitions for spark gap

spark gap

A gap in an otherwise closed electric circuit across which a discharge occurs at a prescribed voltage. The discharge often causes ionization of the surrounding gas and thereby very high temperatures, and can be exploited, as in spark plugs, to ignite engine fuel in a combustion chamber.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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