A spark is a tiny bright piece of burning material that flies up from something that is burning.

A spark is a flash of light caused by electricity. It often makes a loud sound.

If something sparks, sparks of fire or light come from it.

If a burning object or electricity sparks a fire, it causes a fire.

A spark of a quality or feeling, especially a desirable one, is a small but noticeable amount of it.

If one thing sparks another, the first thing causes the second thing to start happening.

If sparks fly between people, they discuss something in an excited or angry way.