Source : Webster's Revised Unabridged Dictionary (1913)

Classify \Clas"si*fy\, v. t. [imp. & pp. {Classified}; p. pr. &
   vb. n. {Classifying}.] [L. classis class + ?]
   To distribute into classes; to arrange according to a system;
   to arrange in sets according to some method founded on common
   properties or characters.

   Syn: To arrange; distibute; rank.

Source : WordNet®

classify
     v 1: arrange or order by classes or categories; "How would you
          classify these pottery shards--are they prehistoric?"
          [syn: {class}, {sort}, {assort}, {sort out}, {separate}]
     2: declare unavailable, as for security reasons; "Classify
        these documents" [ant: {declassify}]
     3: assign to a class or kind; "How should algae be
        classified?"; "People argue about how to relegate certain
        mushrooms" [syn: {relegate}]
     [also: {classified}]