WordWeb Online

1. Brought about or set up or accepted; especially long established
   "distrust the constituted authority";
   - established

1. Form or compose
   "These constitute my entire belonging";
   - represent, make up, comprise, be
    
2. Create and charge with a task or function
   "constitute a committee";
   - appoint, name, nominate
    
3. To compose or represent
   "This wall constitutes the background of the stage setting";
   - form, make
    
4. Set up or lay the groundwork for
   "constitute a new department";
   - establish, found, plant, institute

See also: deep-rooted, deep-seated, entrenched, grooved, implanted, ingrained, legit [informal], legitimate, official, old line, old-line, planted, recognised [Brit], recognized, self-constituted, self-established, well-established, well-grooved

Type of: initiate, pioneer

Antonym: unestablished