Definition of photoflash in US English:

photoflash

noun

  • A flash of light produced to enable a photograph to be taken; a device for producing such a flash; a flashbulb, a flash lamp.

Origin

1920s; earliest use found in The Chronicle-Telegram. From photo- + flash.

Pronunciation

photoflash

/ˈfəʊtə(ʊ)flaʃ/