The Collaborative International Dictionary of English v.0.48:

Behold \Be*hold"\, v. t. [imp. & p. p. Beheld(p. p. formerly
   Beholden, now used only as a p. a.); p. pr. & vb. n.
   Beholding.] [OE. bihalden, biholden, AS. behealdan to hold,
   have in sight; pref. be- + healdan to hold, keep; akin to G.
   behalten to hold, keep. See Hold.]
   To have in sight; to see clearly; to look at; to regard with
   the eyes.
   [1913 Webster]

         When he beheld the serpent of brass, he lived. --Num.
                                                  xxi. 9.
   [1913 Webster]

         Behold the Lamb of God, which taketh away the sin of
         the world.                               --John. i. 29.
   [1913 Webster]

   Syn: To scan; gaze; regard; descry; view; discern.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Behold \Be*hold"\, v. i.
   To direct the eyes to, or fix them upon, an object; to look;
   to see.
   [1913 Webster]

         And I beheld, and, lo, in the midst of the throne, . .
         . a lamb as it had been slain.           --Rev. v. 6.
   [1913 Webster]

WordNet (r) 3.0 (2006):

behold
    v 1: see with attention; "behold Christ!" [syn: behold, lay
         eyes on]

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "behold":
   NB, catch sight of, clap eyes on, descry, discern, discover,
   distinguish, espy, glimpse, have in sight, ken, lay eyes on,
   look at, look on, look upon, make out, mark, note, notice, observe,
   perceive, pick out, recognize, regard, remark, see, sight, spot,
   spy, take in, twig, view, witness