Definitions

1. noun

A sudden flash of light, especially from an electrical discharge or an explosion.

“The backflash from the electrical arc illuminated the surrounding area.”

2. noun

A sudden memory or image that comes into one’s mind.

“A backflash of her childhood memories flooded her thoughts.”

3. verb

To be suddenly illuminated or to emit a flash of light, especially from an electrical discharge or an explosion.

“The wire backflashed when it was touched, causing a brief but intense light.”