[ dah ]

  1. an echoic word, the referent of which is a tone interval approximately three times the length of the dot, used to designate the dash of Morse code, International Morse code, etc.

Origin of dah

First recorded in 1935–40

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use dah in a sentence

  • We tuk five elephints, a hunder' an' sivinty Sniders, two hunder' dahs, and a lot av other burglarious thruck.

    Soldier Stories | Rudyard Kipling
  • Eighteen ponies were taken, 316 firearms, and many dahs and spears.

    The Pacification of Burma | Sir Charles Haukes Todd Crosthwaite
  • The visitor looked around at them, and then remarked: "My, what a lot of boa'dahs you got."

  • They found it in the hands of about sixty Bhuttias, armed with dahs, who were plundering right and left.

    Life in an Indian Outpost | Gordon Casserly
  • They were armed with rusty muzzle-loaders, unloaded, and with long Burmese swords (dahs).

    An Australian in China | George Ernest Morrison

British Dictionary definitions for dah


/ (dɑː) /

  1. the long sound used in combination with the short sound dit, in the spoken representation of Morse and other telegraphic codes: Compare dash 1 (def. 14)

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