The Collaborative International Dictionary of English v.0.48:

Catalepsy \Cat"a*lep`sy\, Catalepsis \Cat`a*lep"sis\, n. [NL.
   catalepsis, fr. Gr. ? a seizure, fr. ? to seize upon; kata`
   down + ? to take, seize.] (Med.)
   A sudden suspension of sensation and volition, the body and
   limbs preserving the position that may be given them, while
   the action of the heart and lungs continues.
   [1913 Webster]

WordNet (r) 3.0 (2006):

catalepsy
    n 1: a trancelike state with loss of voluntary motion and
         failure to react to stimuli

Moby Thesaurus II by Grady Ward, 1.0:

85 Moby Thesaurus words for "catalepsy":
   KO, abeyance, amnesia, apathy, apoplexy, blackout, cataplexy,
   catatonia, catatonic stupor, catatony, coma, daydreaming, daze,
   deadliness, deathliness, diplegia, dormancy, dream state,
   encephalitis lethargica, entropy, faint, fugue, fugue state,
   grayout, hemiplegia, high, hypnotic trance, indifference,
   indolence, inertia, inertness, infantile paralysis, kayo, knockout,
   languor, latency, lethargy, lipothymia, lipothymy, lotus-eating,
   narcohypnosis, narcolepsy, narcoma, narcosis, narcotic stupor,
   narcotization, nirvana, nirvana principle, nod, nothingness,
   oblivion, obliviousness, palsy, paralysis, paraplegia, paresis,
   passiveness, passivity, polio, poliomyelitis, reverie, sedation,
   semiconsciousness, senselessness, sensory paralysis, shock, sleep,
   sleeping sickness, sleepwalking, somnambulism, sopor, stagnancy,
   stagnation, stasis, stroke, stupor, suspense, swoon, syncope,
   thanatosis, torpor, trance, unconsciousness, vegetation,
   vis inertiae