Webster's Revised Unabridged Dictionary · 1913

Mellow

Mellow , adjective

[Old English melwe; compare Anglo-Saxon mearu soft, Dutch murw, Prov. German mollig soft, Dutch malsch, and English meal flour.]

1.
Soft or tender by reason of ripeness; having a tender pulp; as, a mellow apple.
2.
(a) Easily worked or penetrated; not hard or rigid; as, a mellow soil.
(b)
Not coarse, rough, or harsh; subdued; soft; rich; delicate; -- said of sound, color, flavor, style, etc.
Mellow glebe. — Drayton
The mellow horn. — Wordsworth
The mellow-tasted Burgundy. — Thomson
The tender flush whose mellow stain imbues Heaven with all freaks of light. — Percival
3.
Well matured; softened by years; genial; jovial.
May health return to mellow age. — Wordsworth
As merry and mellow an old bachelor as ever followed a hound. — W. Irving
4.
Warmed by liquor; slightly intoxicated. — Addison

Mellow , transitive verb

To make mellow. — Shakespeare
If the Weather prove frosty to mellow it [the ground], they do not plow it again till April. — Mortimer
The fervor of early feeling is tempered and mellowed by the ripeness of age. — J. C. Shairp

Mellow , intransitive verb

To become mellow; as, ripe fruit soon mellows.
Prosperity begins to mellow. — Shakespeare