Source : Webster's Revised Unabridged Dictionary (1913)

Chloroform \Chlo"ro*form\, n. [Chlorine + formyl, it having been
   regarded as a trichloride of this radical: cf. F.
   chloroforme, G. chloroform.] (Chem.)
   A colorless volatile liquid, {CHCl3}, having an ethereal odor
   and a sweetish taste, formed by treating alcohol with
   chlorine and an alkali. It is a powerful solvent of wax,
   resin, etc., and is extensively used to produce an[ae]sthesia
   in surgical operations; also externally, to alleviate pain.

Chloroform \Chlo"ro*form\, v. t. [imp. & p. p. {Chloroformed};
   p. pr. & vb. n. {Chloroforming}.]
   To treat with chloroform, or to place under its influence.

Source : WordNet®

chloroform
     n : a volatile liquid haloform (CHCl3); formerly used as an
         anesthetic; "chloroform was the first inhalation
         anesthetic" [syn: {trichloromethane}]
     v : anesthetize with chloroform; "Doctors used to put people
         under by chloroforming them"