The Collaborative International Dictionary of English v.0.48:

Criticise \Crit"i*cise\ (kr?t"?-s?z), v. t. [imp. & p. p.
   Criticised (-s?zd); p. pr. & vb. n. Criticising.]
   [Written also, more analogically, but less commonly,
   criticize.] [Cf. G. kritisiren. See Critic.]
   1. To examine and judge as a critic; to pass literary or
      artistic judgment upon; as, to criticise an author; to
      criticise a picture.
      [1913 Webster]

   2. To express one's views as to the merit or demerit of;
      esp., to animadvert upon; to find fault with; as, to
      criticise conduct. --Blackwood's Mag.

   Syn: criticize, pick apart.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Criticise \Crit"i*cise\, v. i.
   1. To act as a critic; to pass literary or artistic judgment;
      to play the critic; -- formerly used with on or upon.
      [1913 Webster]

            Several of these ladies, indeed, criticised upon the
            form of the association.              --Addison.
      [1913 Webster]

   2. To discuss the merits or demerits of a thing or person;
      esp., to find fault.
      [1913 Webster]

            Cavil you may, but never criticise.   -- Pope.
      [1913 Webster]

WordNet (r) 3.0 (2006):

criticise
    v 1: find fault with; express criticism of; point out real or
         perceived flaws; "The paper criticized the new movie";
         "Don't knock the food--it's free" [syn: knock,
         criticize, criticise, pick apart] [ant: praise]
    2: act as a critic; "Those who criticize others often are not
       perfect, either" [syn: criticize, criticise]