plural of hot flash

(idiomatic, simile) Extremely quick.

(idiomatic, simile) Extremely quickly.

(meteorology, astronomy) A rare phenomenon observed in morning or evening when the sun is crossing or immediately below the horizon, in which a momentary flash or ray of green light appears above the upper rim of the solar disk, caused by refraction of light in the atmosphere.

(meteorology, astronomy) A very rare phenomenon observed in the morning or evening when the sun is crossing or immediately below the horizon, in which a momentary flash of blue light appears above the upper rim of the solar disk, caused by refraction of light in the atmosphere.

A hand grenade that produces a very bright flash and a loud explosion, but no shrapnel and minimal explosive force, to disorient the target.

(countable) A fictional story that is briefer than typical short stories. / (uncountable) The genre of such stories.

plural of green flash

In video or film editing, a very short shot (usually one frame, but occasionally several) appearing in a sequence of images. Flash frames are usually the inadvertent result of an editing mistake or an equipment problem. From time to time, however, they are inserted intentionally for creative reasons.

plural of flash fiction