(intransitive) To appear suddenly on a screen.

(roofing) Flashing, usually composed of metal, used to cover or shield the upper edges of the membrane base flashing; wall flashing can also be used to cover the top of various building components, such as parapets or columns.

(roofing) Plies or strips of roof membrane material used to close-off and/or seal a roof at the horizonta-to-vertical intersections. Membrane base flashing covers the edge of the field membrane.

(roofing) an accessory flashing used to cover and/or seal soil pipe vents and other penetrations through a roof (sometimes referred to as roof jack or flashing boot).

plural of flash paper

A sheet of paper or cloth made from nitrocellulose, which burns almost instantly with a bright flash and leaves no ash. It is used in magic tricks.

plural of flash memory

(photography) A powder that burns with a very rapid flash when ignited; used in pyrotechnics and early flash photography.

(retail, marketing) A package printed with a special discount offer on it. / (photography) A device attached to a camera to provide a flash.

plural of flash pack