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]

Moby Thesaurus II by Grady Ward, 1.0:

65 Moby Thesaurus words for "levitate":
   arise, ascend, boost, buoy up, cast up, come up, curl upwards,
   elevate, erect, escalate, float, go up, grow up, heave, heft,
   heighten, heist, hike, hoick, hoist, hold up, jerk up, knock up,
   lift, lift up, lob, loft, loom, mount, perk up, raise, raise up,
   rear, rear up, rise, rise up, set up, sky, spiral, spire, stand up,
   stick up, surge, swarm up, sweep up, throw up, tower, up, upbuoy,
   upcast, upgo, upgrow, upheave, uphoist, uphold, uplift, upraise,
   uprear, uprise, upspin, upstream, upsurge, upswarm, upthrow,
   upwind