n.
Function: noun
Date: 1549
1 a : a sudden burst of light b : a movement of a flag in signaling
2 : a sudden and often brilliant burst <a flash of wit>
3 : a brief time <I'll be back in a flash >
4 a : SHOW , DISPLAY especially : a vulgar ostentatious display b archaic : a showy ostentatious person c : one that attracts notice especially : an outstanding athlete d : PIZZAZZ
5 obsolete : thieves' slang
6 : something flashed: as a : GLIMPSE , LOOK b : SMILE c : a first brief news report d : FLASHLIGHT 2 e : a quick-spreading flame or momentary intense outburst of radiant heat f (1) : FLASHLIGHT 1 (2) : a device for producing a flashlight for taking photographs
7 : RUSH 7A
8 : the rapid conversion of a liquid into vapor