- (of sound reproduction) having a single channel; monaural (compare stereophonic)
- (music) having a single melodic line and no harmony (compare polyphonic)
- (orthography) having simple one-to-one mapping between letters and phonemes
- 1828 July 7, Peter S. Du Ponceau, “On some Points connected with the Nature of the Chinese Language (enclosure in letter from Basil Hall)”, in The Philosophical magazine, volume 5:
- From a similar selection, says M. Remusat, the Coreans have made a monophonic alphabet of nine vowels and fifteen consonants, with which they write their language.