Source : Webster's Revised Unabridged Dictionary (1913)

Chilliness \Chill"i*ness\, n.
   1. A state or sensation of being chilly; a disagreeable
      sensation of coldness.

   2. A moderate degree of coldness; disagreeable coldness or
      rawness; as, the chilliness of the air.

   3. Formality; lack of warmth.

Source : WordNet®

chilliness
     n : the property of being moderately cold; "the chilliness of
         early morning" [syn: {coolness}]