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Definition of 'spark'


  1. a momentary flash of light
       Synonyms: flicker glint
  2. merriment expressed by a brightness or gleam or animation of countenance; "he had a sparkle in his eye"; "there's a perpetual twinkle in his eyes"
       Synonyms: sparkle twinkle light
  3. electrical conduction through a gas in an applied electric field
       Synonyms: discharge arc electric arc electric discharge
  4. a small but noticeable trace of some quality that might become stronger; "a spark of interest"; "a spark of decency"
  5. Scottish writer of satirical novels (born in 1918)
       Synonyms: Muriel Spark Dame Muriel Spark Muriel Sarah Spark
  6. a small fragment of a burning substance thrown out by burning material or by friction


  1. put in motion or move to act; "trigger a reaction"; "actuate the circuits"
       Synonyms: trip actuate trigger activate set off spark off trigger off touch off
  2. emit or produce sparks; "A high tension wire, brought down by a storm, can continue to spark"
       Synonyms: sparkle

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