The Collaborative International Dictionary of English v.0.48:

Chilling \Chill"ing\, a.
   Making chilly or cold; depressing; discouraging; cold;
   distant; as, a chilling breeze; a chilling manner. --
   Chill"ing"ly, adv.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Chill \Chill\, v. t. [imp. & p. p. Chilled (ch[i^]ld); p. pr.
   & vb. n. Chilling.]
   1. To strike with a chill; to make chilly; to cause to
      shiver; to affect with cold.
      [1913 Webster]

            When winter chilled the day.          --Goldsmith.
      [1913 Webster]

   2. To check enthusiasm or warmth of feeling of; to depress;
      to discourage.
      [1913 Webster]

            Every thought on God chills the gayety of his
            spirits.                              --Rogers.
      [1913 Webster]

   3. (Metal.) To produce, by sudden cooling, a change of
      crystallization at or near the surface of, so as to
      increase the hardness; said of cast iron.
      [1913 Webster]

WordNet (r) 3.0 (2006):

chilling
    adj 1: provoking fear terror; "a scary movie"; "the most
           terrible and shuddery...tales of murder and revenge"
           [syn: chilling, scarey, scary, shivery,
           shuddery]
    n 1: the process of becoming cooler; a falling temperature [syn:
         cooling, chilling, temperature reduction]

Moby Thesaurus II by Grady Ward, 1.0:

76 Moby Thesaurus words for "chilling":
   ache, aching, adiabatic absorption, adiabatic demagnetization,
   adiabatic expansion, air conditioning, air cooling, alarming,
   algific, awing, blast freezing, blast-freezing, chilblains, chill,
   chilliness, cold creeps, cold shivers, congealing, congealment,
   congelation, cooling, creeps, cryogenics, cryopathy, daunting,
   deep freezing, dehydrofreezing, deterrent, deterring,
   disconcerting, discouraging, disheartening, dismaying, disquieting,
   dithers, duck bumps, electric refrigeration, fear-inspiring,
   fearful, fearsome, food freezing, freezable, freezing, frightening,
   frightful, frigorific, frostbite, gas refrigeration, glaciable,
   glaciation, glacification, goose bumps, goose pimples, gooseflesh,
   horripilation, infrigidation, kibe, mechanical refrigeration,
   overawing, quick freezing, quick-freezing,
   reduction of temperature, refreezing, refrigerant, refrigeration,
   refrigerative, refrigeratory, regelation, scaring, scary,
   sharp freezing, sharp-freezing, shivering, shivers, startling,
   super-cooling