(of paint used on an aircraft) Intended to reflect the thermal radiation from a nuclear detonation.

Alternative form of flashcard

plural of flash card

plural of flash mob

Alternative spelling of newsflash

(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.