Definition of "flashing"

A sudden blazing or bursting, as of fire or water.  examples

(roofing) Components used to weatherproof or seal roof system edges at perimeters, penetrations, walls, expansion joints, valleys, drains and other places where the roof covering is interrupted or terminated.  examples

The process of getting rid of gaps on shelves by bringing products from the back of the shelf to the front to create a 'fuller' shelf.  examples

The blinking of a light source, such as a light bulb or computer's cursor.  examples

The exposing of one's naked body, or part of it, in public briefly (the action of the verb to flash).  examples

(jewelry) The use of rhodium plating to temporarily enhance a ring's durability and shine.  examples

present participle and gerund of flash  examples