Is “Dah” a Scrabble word?
Yes
DAH
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Dah
/dɑː/
noun
1.The spoken representation of a dash in radio and telegraph Morse code.