The Collaborative International Dictionary of English v.0.48:

Mull \Mull\ (m[u^]l), n. [Perh. contr. fr. mossul. See
   Muslin.]
   A thin, soft kind of muslin.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mull \Mull\, n. [Icel. m[=u]li a snout, muzzle, projecting crag;
   or cf. Ir. & Gael. meall a heap of earth, a mound, a hill or
   eminence, W. moel. Cf. Mouth.]
   1. A promontory; as, the Mull of Cantyre. [Scot.]
      [1913 Webster]

   2. A snuffbox made of the small end of a horn.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mull \Mull\, n. [Prob. akin to mold. [root]108. See Mold.]
   Dirt; rubbish. [Obs.] --Gower.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mull \Mull\, v. t. [OE. mullen. See 2d Muller.]
   To powder; to pulverize. [Prov. Eng.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mull \Mull\, v. i.
   To work (over) mentally; to cogitate; to ruminate; -- usually
   with over; as, to mull over a thought or a problem. [Colloq.
   U.S.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mull \Mull\, n.
   An inferior kind of madder prepared from the smaller roots or
   the peelings and refuse of the larger.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mull \Mull\, v. t. [imp. & p. p. Mulled (m[u^]ld); p. pr. &
   vb. n. Mulling.] [From mulled, for mold, taken as a p. p.;
   OE. mold-ale funeral ale or banquet. See Mold soil.]
   1. To heat, sweeten, and enrich with spices; as, to mull
      wine.
      [1913 Webster]

            New cider, mulled with ginger warm.   --Gay.
      [1913 Webster]

   2. To dispirit or deaden; to dull or blunt. --Shak.
      [1913 Webster] Mulla

WordNet (r) 3.0 (2006):

mull
    n 1: a term used in Scottish names of promontories; "the Mull of
         Kintyre"
    2: an island in western Scotland in the Inner Hebrides
    v 1: reflect deeply on a subject; "I mulled over the events of
         the afternoon"; "philosophers have speculated on the
         question of God for thousands of years"; "The scientist
         must stop to observe and start to excogitate" [syn: chew
         over, think over, meditate, ponder, excogitate,
         contemplate, muse, reflect, mull, mull over,
         ruminate, speculate]
    2: heat with sugar and spices to make a hot drink; "mulled
       cider"

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "mull":
   addle, ball up, befuddle, benumb, bewilder, blunt, botch, botchery,
   candy, chafe, chew over, con, consider, contemplate, cook, dally,
   deliberate over, desensitize, dillydally, discombobulate, distract,
   dulcify, dull, edulcorate, electric-heat, evaluate, examine, fire,
   fire up, foment, fuddle, gas-heat, glaze, hash, heat, honey, hot,
   hot up, hot-air-heat, hot-water-heat, linger, loiter, mix-up,
   muddle, mull over, muse on, muss, numb, overheat, poke, ponder,
   preheat, procrastinate, put off, recook, reheat, review,
   ruminate over, saccharify, shambles, steam, stoke up, study, sugar,
   sugar off, sugarcoat, superheat, sweeten, tarry, tepefy,
   think about, think over, throw off, turn over, warm, warm over,
   warm up, weigh