Webster's Revised Unabridged Dictionary · 1913

Mull

Mull (mul) , noun

[Perh. contr. from mossul. See Muslin.]

A thin, soft kind of muslin.

Mull , noun

[Icelandic mūli a snout, muzzle, projecting crag; or compare Ir. & Gael. meall a heap of earth, a mound, a hill or eminence, Welsh moel. Compare Mouth.]

1.
A promontory; as, the Mull of Cantyre. [Scottish]
2.
A snuffbox made of the small end of a horn.

Mull , noun

[Probably akin to mold. r108. See Mold.]

Dirt; rubbish. [Obsolete] — Gower

Mull , transitive verb

[Old English mullen. See 2d Muller.]

To powder; to pulverize. [Provincial English]

Mull , intransitive verb

To work (over) mentally; to cogitate; to ruminate; -- usually with over; as, to mull over a thought or a problem. [Colloquial United States]

Mull , noun

An inferior kind of madder prepared from the smaller roots or the peelings and refuse of the larger.

Mull (muld) , transitive verb

[From mulled, for mold, taken as a p. p.; Old English mold-ale funeral ale or banquet. See Mold soil.]

1.
To heat, sweeten, and enrich with spices; as, to mull wine.
New cider, mulled with ginger warm. — Gay
2.
To dispirit or deaden; to dull or blunt. — Shakespeare