/ Dictionary / Index D dah: Meaning and Definition of Find definitions for: dah Pronunciation: (dä), [key] — 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, International Morse code, etc. Cf. dit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dah (Thesaurus) Dagwood sandwich dahabeah Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language