spark gap

  1. a space between two electrodes, across which a discharge of electricity may take place.

  2. the electrodes and the space between, considered as a unit: used in ignition systems.

Origin of spark gap

First recorded in 1885–90

Words Nearby spark gap Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use spark gap in a sentence

  • A spark gap in a vacuum, connected with a free end of wire, gave a continuous discharge.

    The Home of the Blizzard | Douglas Mawson
  • The secondary charges a condenser until its potential becomes high enough to produce a discharge across a spark gap, SG.

    Physics | Willis Eugene Tower
  • By lengthening the wires between the spark gap and the camera the light is allowed to arrive first.

  • Almost immediately after Dawson disappeared the crash of the spark across the spark-gap and up the wires was heard.

  • The crash of his call soon sounded at the spark-gap and quivered on its lightning way up the aerials.

British Dictionary definitions for spark gap

spark gap

  1. the space between two electrodes across which a spark can jump: Sometimes 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

  1. 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.