The Collaborative International Dictionary of English v.0.48:

Confuse \Con*fuse"\, v. t. [imp. & p. p. Confused; p. pr. &
   vb. n. Confusing.]
   1. To mix or blend so that things can not be distinguished;
      to jumble together; to confound; to render indistinct or
      obscure; as, to confuse accounts; to confuse one's vision.
      [1913 Webster]

            A universal hubbub wild
            Of stunning sounds and voices all confused.
                                                  --Milton.
      [1913 Webster]

   2. To perplex; to disconcert; to abash; to cause to lose
      self-possession.
      [1913 Webster]

            Nor thou with shadowed hint confuse
            A life that leads melodious days.     --Tennyson.
      [1913 Webster]

            Confused and sadly she at length replied. --Pope.

   Syn: To abash; disorder; disarrange; disconcert; confound;
        obscure; distract. See Abash.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

confusing \confusing\ adj.
   1. causing mental confusion and perplexity.

   Syn: perplexing, stupefying.
        [WordNet 1.5]

   2. causing bafflement and confusion; as, he sent confusing
      signals to Iraq.

   Syn: bewildering, confused.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

confusing
    adj 1: causing confusion or disorientation; "a confusing jumble
           of road signs"; "being hospitalized can be confusing and
           distressing for a small child"
    2: lacking clarity of meaning; causing confusion or perplexity;
       "sent confusing signals to Iraq"; "perplexing to someone who
       knew nothing about it"; "a puzzling statement" [syn:
       confusing, perplexing, puzzling]