The Collaborative International Dictionary of English v.0.48:

Murder \Mur"der\, v. t. [imp. & p. p. Murdered
   (m[^u]r"d[~e]rd); p. pr. & vb. n. Murdering.] [OE.
   mortheren, murtheren, AS. myr[eth]rian; akin to OHG.
   murdiren, Goth. ma['u]r[thorn]rjan. See Murder, n.]
   1. To kill with premediated malice; to kill (a human being)
      willfully, deliberately, and unlawfully. See Murder, n.
      [1913 Webster]

   2. To destroy; to put an end to.
      [1913 Webster]

            [Canst thou] murder thy breath in middle of a word?
                                                  --Shak.
      [1913 Webster]

   3. To mutilate, spoil, or deform, as if with malice or
      cruelty; to mangle; as, to murder the king's English.
      [1913 Webster]

   Syn: To kill; assassinate; slay. See Kill.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

murdered \murdered\ adj.
   killed unlawfully; as, the murdered woman.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

murdered
    adj 1: killed unlawfully; "the murdered woman"; "lay a wreath on
           murdered Lincoln's bier"

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "murdered":
   botched, bungled, butchered, fumbled, ill-advised, ill-considered,
   ill-contrived, ill-devised, ill-done, ill-executed, ill-managed,
   impolitic, misconducted, misdirected, misguided, mismanaged,
   muffed, negligent, spoiled