dah

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dah

 (dä)
n.
The spoken representation of a dash in radio and telegraph code.

[Imitative.]

dah

(dɑː)
n
(Communications & Information) the long sound used in combination with the short sound dit, in the spoken representation of Morse and other telegraphic codes. Compare dash114

dah

(dɑ)

n.
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. Compare dit.
[1935–40]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.dah - the longer of the two telegraphic signals used in Morse code
international Morse code, Morse, Morse code - a telegraph code in which letters and numbers are represented by strings of dots and dashes (short and long signals)
radiotelegraphic signal, telegraphic signal - a signal transmitted by telegraphy