Dictionary.com
definitions

flashboard

[flash-bawrd, -bohrd]
|

noun Civil Engineering.

a board, or one of a series of boards, as on a milldam, used to increase the depth of the impounded water.

Origin of flashboard

First recorded in 1760–70; flash + board
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for flashboard

Historical Examples of flashboard

  • The water poured over the flashboard with a splashing murmur at that distance, and ran down under the bridge in a rocky bed.

  • Thus meditating he drew nearer to the place where the flashboard was down and the water poured into the rocky river bed.

British Dictionary definitions for flashboard

flashboard

noun

a board or boarding that is placed along the top of a dam to increase its height and capacityAlso called: stop log, stop plank
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012