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.]
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   2. A snuffbox made of the small end of a horn.
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The Collaborative International Dictionary of English v.0.48:

Mull \Mull\, n. [Prob. akin to mold. [root]108. See Mold.]
   Dirt; rubbish. [Obs.] --Gower.
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The Collaborative International Dictionary of English v.0.48:

Mull \Mull\, v. t. [OE. mullen. See 2d Muller.]
   To powder; to pulverize. [Prov. Eng.]
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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.]
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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.
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            New cider, mulled with ginger warm.   --Gay.
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   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"