sweetly or smoothly flowing; sweet-sounding: a mellifluous voice; mellifluous tones.
2.
flowing with honey; sweetened with or as if with honey.
Origin: 1375–1425;late Middle English < Late Latinmellifluus, equivalent to Latinmelli- (stem of mel) honey + -flu(ere) to flow + -us adj. suffix (see -ous)
early 15c., from L.L. mellifluus "flowing with (or as if with) honey," from L. mel (gen. mellis) "honey" + -fluus "flowing," from fluere "to flow" (see fluent).