WordWeb Online

1. Regarded with great favour, approval, or affection especially by the general public
   "a popular tourist attraction"; "cabbage patch dolls are no longer popular";
   - big
    
2. Carried on by or for the people (or citizens) at large
   "the popular vote"; "popular representation"; "institutions of popular government"
    
3. Representing or appealing to or adapted for the benefit of the people at large
   "a democratic or popular movement"; "popular thought";
   - democratic
    
4. (of music or art) new and of general appeal (especially among young people)
   - pop

See also: best-selling, common, democratic, fashionable, favorite [US], favourite [Brit, Cdn], happening [informal], hot [informal], in fashion, nonclassical, popularity, sexy [informal], touristed, touristy, trendy [informal]

Antonym: unpopular

Encyclopedia: Popular, Round One