Source : Webster's Revised Unabridged Dictionary (1913)

Hypnotic \Hyp*not"ic\, a. [Gr. ? inclined to sleep, putting to
   sleep, fr. ? to lull to sleep, fr. ? sleep; akin to L.
   somnus, and E. somnolent: cf. F. hypnotique.]
   1. Having the quality of producing sleep; tending to produce
      sleep; soporific.

   2. Of or pertaining to hypnotism; in a state of hypnotism;
      liable to hypnotism; as, a hypnotic condition.

Hypnotic \Hyp*not"ic\, n.
   1. Any agent that produces, or tends to produce, sleep; an
      opiate; a soporific; a narcotic.

   2. A person who exhibits the phenomena of, or is subject to,
      hypnotism.

Source : WordNet®

hypnotic
     adj : attracting and holding interest as if by a spell; "read the
           bedtime story in a hypnotic voice"; "she had a warm
           mesmeric charm"; "the sheer force of his presence was
           mesmerizing"; "a spellbinding description of life in
           ancient Rome" [syn: {mesmeric}, {mesmerizing}, {spellbinding}]
     n : a drug that induces sleep [syn: {soporific}]