#1 spark v. [trip, actuate, trigger, activate, set off, spark off, trigger off, touch off] put in motion or move to act; "trigger a reaction"; "actuate the circuits". wn
#2 spark n. [flicker, glint] a momentary flash of light. wn
#3 spark n. [sparkle, twinkle, light] 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". wn
#4 spark n. [discharge, arc, electric arc, electric discharge] electrical conduction through a gas in an applied electric field. wn
#5 spark v. [sparkle] emit or produce sparks; "A high tension wire, brought down by a storm, can continue to spark". wn
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