無む電でんむでんMeanings1nounwireless; radio communicationabbreviationAbbreviation of 無線電信 (wireless telegraphy). Used in older or technical contexts; modern Japanese more often uses 無線.See also: 無線電信昔むかしは無む電でんで連れん絡らくを取とっていた。In the old days, they communicated by wireless.