Definitions of flash:

• noun:   a lamp for providing momentary light to take a photograph
• noun:   a bright patch of color used for decoration or identification

  Example: "Red flashes adorned the airplane"

• noun:   a momentary brightness
• noun:   a sudden brilliant understanding

  Example: "He had a flash of intuition"

• noun:   a short vivid experience

  Example: "A flash of emotion swept over him"

• noun:   a sudden intense burst of radiant energy
• noun:   a burst of light used to communicate or illuminate
• noun:   a very short time (as the time it takes the eye blink or the heart to beat)

  Example: "If I had the chance I'd do it in a flash"

• noun:   a short news announcement concerning some on-going news story
• verb:   expose or show briefly

  Example: "He flashed a $100 bill"

• verb:   gleam or glow intermittently

  Example: "The lights were flashing"

• verb:   appear briefly

  Example: "The headlines flashed on the screen"

• verb:   emit a brief burst of light

  Example: "A shooting star flashed and was gone"

• verb:   make known or cause to appear with great speed

  Example: "The latest intelligence is flashed to all command posts"

• verb:   protect by covering with a thin sheet of metal

  Example: "Flash the roof"

• verb:   display proudly; act ostentatiously or pretentiously
• verb:   run or move very quickly or hastily
• adjective:   tastelessly showy

  Example: "A flash car"

• name:  A surname (very rare: popularity rank in the U.S.: #40755)