1.A small particle of fire or ignited substance which is emitted by a body in combustion. "Man is born unto trouble, as the sparks fly upward."
2.A small, shining body, or transient light; a sparkle.
3.That which, like a spark, may be kindled into a flame, or into action; a feeble germ; an elementary principle. "If any spark of life be yet remaining." "Small intellectual spark." "Vital spark of heavenly flame." "We have here and there a little clear light, some sparks of bright knowledge." "Bright gem instinct with music, vocal spark."