The Collaborative International Dictionary of English v.0.48:

Anxious \Anx"ious\ ([a^][ng]k"sh[u^]s), a. [L. anxius, fr.
   angere to cause pain, choke; akin to Gr. 'a`gchein to choke.
   See Anger.]
   1. Full of anxiety or disquietude; greatly concerned or
      solicitous, esp. respecting something future or unknown;
      being in painful suspense; -- applied to persons; as,
      anxious for the issue of a battle.
      [1913 Webster]

   2. Accompanied with, or causing, anxiety; worrying; --
      applied to things; as, anxious labor.
      [1913 Webster]

            The sweet of life, from which
            God hath bid dwell far off all anxious cares.
                                                  --Milton.
      [1913 Webster]

   3. Earnestly desirous; as, anxious to please.
      [1913 Webster]

            He sneers alike at those who are anxious to preserve
            and at those who are eager for reform. --Macaulay.
      [1913 Webster]

   Note: Anxious is followed by for, about, concerning, etc.,
         before the object of solicitude.
         [1913 Webster]

   Syn: Solicitous; careful; uneasy; unquiet; restless;
        concerned; disturbed; watchful.
        [1913 Webster]

WordNet (r) 3.0 (2006):

anxious
    adj 1: eagerly desirous; "anxious to see the new show at the
           museum"; "dying to hear who won" [syn: anxious(p),
           dying(p)]
    2: causing or fraught with or showing anxiety; "spent an anxious
       night waiting for the test results"; "cast anxious glances
       behind her"; "those nervous moments before takeoff"; "an
       unquiet mind" [syn: anxious, nervous, queasy, uneasy,
       unquiet]