noun flash·board \ˈflash-ˌbȯrd\

Definition of flashboard

  1. :  one or more boards projecting above the top of a dam to increase the depth of the water

Circa 1774

First Known Use of flashboard

circa 1774

Learn More about flashboard

Seen and Heard

What made you want to look up flashboard? Please tell us where you read or heard it (including the quote, if possible).