The Collaborative International Dictionary of English v.0.48:

Lull \Lull\ (l[u^]l), v. t. [imp. & p. p. Lulled (l[u^]ld); p.
   pr. & vb. n. Lulling.] [Akin to OD. lullen to sing to
   sleep, G. lullen, Dan. lulle, Sw. lulla; all of imitative
   origin. Cf. Loll, Lollard.]
   To cause to rest by soothing influences; to compose; to calm;
   to soothe; to quiet. " To lull him soft asleep." --Spenser.
   [1913 Webster]

         Such sweet compulsion doth in music lie,
         To lull the daughters of necessity.      --Milton.
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The Collaborative International Dictionary of English v.0.48:

Lull \Lull\, v. i.
   To become gradually calm; to subside; to cease or abate for a
   time; as, the storm lulls.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lull \Lull\, n.
   1. The power or quality of soothing; that which soothes; a
      lullaby. [R.] --Young.
      [1913 Webster]

   2. A temporary cessation of storm or confusion.
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WordNet (r) 3.0 (2006):

lull
    n 1: a pause during which things are calm or activities are
         diminished; "there was never a letup in the noise" [syn:
         letup, lull]
    2: a period of calm weather; "there was a lull in the storm"
       [syn: lull, quiet]
    v 1: calm by deception; "Don't let yourself be lulled into a
         false state of security"
    2: become quiet or less intensive; "the fighting lulled for a
       moment" [syn: lull, calm down]
    3: make calm or still; "quiet the dragons of worry and fear"
       [syn: calm, calm down, quiet, tranquilize,
       tranquillize, tranquillise, quieten, lull, still]
       [ant: agitate, charge, charge up, commove, excite,
       rouse, turn on]