Antonyms of adj popular

4 senses of popular

Sense 1
popular (vs. unpopular) -- (regarded with great favor, approval, or affection especially by the general public; "a popular tourist attraction"; "a popular girl"; "cabbage patch dolls are no longer popular")

unpopular (vs. popular) -- (regarded with disfavor or lacking general approval; "unpopular ideas"; "an unpopular war")
        => less-traveled -- (not visited by many travelers; "the tourist's desire to visit less-traveled countries")

Sense 2
popular -- (carried on by or for the people (or citizens) at large; "the popular vote"; "popular representation"; "institutions of popular government")

INDIRECT (VIA democratic) -> undemocratic -- (not in agreement with or according to democratic doctrine or practice or ideals; "the union broke with its past undemocratic procedures")

Sense 3
democratic, popular -- (representing or appealing to or adapted for the benefit of the people at large; "democratic art forms"; "a democratic or popular movement"; "popular thought"; "popular science"; "popular fiction")

INDIRECT (VIA common) -> uncommon -- (not common or ordinarily encountered; unusually great in amount or remarkable in character or kind; "uncommon birds"; "frost and floods are uncommon during these months"; "doing an uncommon amount of business"; "an uncommon liking for money"; "he owed his greatest debt to his mother's uncommon character and ability")

Sense 4
popular, pop -- ((of music or art) new and of general appeal (especially among young people))

INDIRECT (VIA nonclassical) -> classical, classic -- (of or relating to the most highly developed stage of an earlier civilisation and its culture; "classic Cinese pottery")

Similarity of adj popular

4 senses of popular

Sense 1
popular (vs. unpopular) -- (regarded with great favor, approval, or affection especially by the general public; "a popular tourist attraction"; "a popular girl"; "cabbage patch dolls are no longer popular")
       => best-selling (predicate) -- (selling in great numbers; "a best-selling novel")
       => fashionable -- (patronized by)
       => favorite, favourite -- (appealing to the general public; "a favorite tourist attraction")
       => hot -- (very popular or successful; "one of the hot young talents"; "cabbage patch dolls were hot last season")
       => touristed, touristy -- (visited by throngs of tourists; "of the three American Virgin islands St. Thomas is the most touristed"; "tourists descend in busloads...so the whole place is rather touristy")

Sense 2
popular -- (carried on by or for the people (or citizens) at large; "the popular vote"; "popular representation"; "institutions of popular government")
       => democratic (vs. undemocratic) -- (characterized by or advocating or based upon the principles of democracy or social equality; "democratic government"; "a democratic country"; "a democratic scorn for bloated dukes and lords"- George du Maurier)

Sense 3
democratic, popular -- (representing or appealing to or adapted for the benefit of the people at large; "democratic art forms"; "a democratic or popular movement"; "popular thought"; "popular science"; "popular fiction")
       => common (vs. uncommon) -- (having no special distinction or quality; widely known or commonly encountered; average or ordinary or usual; "the common man"; "a common sailor"; "the common cold"; "a common nuisance"; "followed common procedure"; "it is common knowledge that she lives alone"; "the common housefly"; "a common brand of soap")

Sense 4
popular, pop -- ((of music or art) new and of general appeal (especially among young people))
       => nonclassical (vs. classical) -- (not classical)