The Collaborative International Dictionary of English v.0.48:

Levitate \Lev"i*tate\ (l[e^]v"[i^]*t[=a]t), v. i. [L. levitas,
   -atis, lightness. See Levity.]
   To rise, or tend to rise, as if lighter than the surrounding
   medium; to become buoyant; -- opposed to gravitate. --Sir.
   J. Herschel.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Levitate \Lev"i*tate\, v. t. (Spiritualism)
   To make buoyant; to cause to float in the air; as, to
   levitate a table. [Cant]
   [1913 Webster]

WordNet (r) 3.0 (2006):

levitate
    v 1: cause to rise in the air and float, as if in defiance of
         gravity; "The magician levitated the woman"
    2: be suspended in the air, as if in defiance of gravity; "The
       guru claimed that he could levitate" [syn: levitate,
       hover]