—adj.
1 (of sound, colour, light) soft and rich, free from harshness.
2 (of character) softened or matured by age or experience.
3 genial, jovial.
4 partly intoxicated.
5 (of fruit) soft, sweet, and juicy.
6 (of wine) well-matured, smooth.
7 (of earth) rich, loamy.
—v.tr. & intr. make or become mellow.
Derivatives:
mellowly adv. mellowness n.
Etymology: ME, perh. f. attrib. use of OE melu, melw- MEAL(2)
Useful english dictionary. 2012.