to arrange or organize by classes; order according to class.

to assign a classification to (information, a document, etc.). Compare classification ( def. 5 ) .

to limit the availability of (information, a document, etc.) to authorized persons.

verb

allocate , allot , alphabetize , analyze , arrange , assort , brand , break down , button down , catalogue , class , codify , collocate , coordinate , correlate , dispose , distinguish , distribute , divide , docket , embody , file , grade , group , incorporate , index , label , match , name , number , order , organize , peg * , pigeonhole * , put away , put down as , put down for , range , rank , rank out , rate , regiment , segregate , size , size up , sort , systematize , tab , tabulate , tag , take one’s measure , ticket , type , typecast , categorize , pigeonhole , separate , place , catalog , list , register