WordReference Random House Learner's Dictionary of American English © 2026
Morse code /ˈmɔrs ˈkoʊd/USA pronunciation n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2026- Telecommunications, Cryptographyeither of two systems of clicks and spaces, short and long sounds, or flashes of light, used to represent letters, numerals, etc.
Morse′ code′,
- Telecommunications, Cryptographyeither of two systems of clicks and pauses, short and long sounds, or flashes of light, used to represent the letters of the alphabet, numerals, etc.: now used primarily in radiotelegraphy by ham operators. Also called Morse′ al′phabet.
- after south, southern. French. B. Morse 1830–40
'Morse code' also found in these entries (note: many are not synonyms or translations):
Aldis lamp
- code
- GMDSS
- heliograph
- key
- long
- radiotelegraphy
- SOS
- space
- continental code
- dah
- dash
- dit
- dot
- international Morse code
- morse
- Morse lamp
- omnigraph