spark definition

1. merriment expressed by a brightness or gleam or animation of countenance
• examples: he had a sparkle in his eye
• examples: there's a perpetual twinkle in his eyes
2. a small but noticeable trace of some quality that might become stronger
• examples: a spark of interest
• examples: a spark of decency
3. Scottish writer of satirical novels (born in 1918)
4. a small fragment of a burning substance thrown out by burning material or by friction
5. emit or produce sparks
• examples: A high tension wire, brought down by a storm, can continue to spark