| DAH | the longer of the two telegraphic signals used in Morse code |
|---|---|
| DAH | the capital and largest city of Bangladesh |
| DAH | small highly nutritious seed of the tropical pigeon-pea plant |
| DAH | tropical woody herb with showy yellow flowers and flat pods |
| DAH | any of several plants of or developed from the species Dahlia pinnata having tuberous roots and showy rayed variously colored flower heads |
| DAH | any of several plants of or developed from the species Dahlia pinnata having tuberous roots and showy rayed variously colored flower heads |
| DAH | a country on western coast of Africa |