Harmony or beauty of sound which provides a pleasing effect to the ear, usually sought-for in poetry for effect. It is achieved not only by the selection of individual word-sounds, but also by their arrangement in the repetition, proximity, and flow of sound patterns.
Sidelight: The consonants considered most pleasing in sound are l, m, n, r, v, and w. The harsher consonants in euphonious texts become less jarring when in the proximity of softer sounds. Vowel sounds are generally more euphonious than the consonants, so a line with a higher ratio of vowel sounds will produce a more agreeable effect; also, the long vowels in words like moon and fate are more melodious than the short vowels in cat and bed. But the most important measure of euphonic strategies is their appropriateness to the subject.
(See also Alliteration, Assonance, Consonance, Modulation, Sound Devices)
(Compare Resonance)
(Contrast Cacophony, Dissonance)

This definition is in context to Poetry. See more contextual defintions for Euphony (Yoo-fuh-nee).