1. 
2. 
[syn: grogginess, stupor, stupefaction, semiconsciousness]
3.  the action of stupefying;  making dull or lethargic; 
- Example: "the professor was noted for his stupefaction of the students"
The Collaborative International Dictionary of English v.0.48:
Stupefaction \Stu`pe*fac"tion\, n. [Cf. F. stup['e]faction. See
   Stupefacient.]
   The act of stupefying, or the state of being stupefied.
   [Written also stupifaction.]
   [1913 Webster]
         Resistance of the dictates of conscience brings a
         hardness and stupefaction upon it.       --South.
   [1913 Webster]
WordNet (r) 3.0 (2006):
stupefaction
    n 1: a feeling of stupefied astonishment
    2: marginal consciousness; "his grogginess was caused as much by
       exhaustion as by the blows"; "someone stole his wallet while
       he was in a drunken stupor" [syn: grogginess, stupor,
       stupefaction, semiconsciousness]
    3: the action of stupefying; making dull or lethargic; "the
       professor was noted for his stupefaction of the students"