Meaning of posthypnotic

post•hyp•not•ic

Pronunciation: (pōst"hip-not'ik), [key]
— adj.
  1. of or pertaining to the period after hypnosis.
  2. (of a suggestion) made during hypnosis so as to be effective after awakening.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.