WordWeb Online

1. Tastelessly showy
   "a meretricious yet stylish book";
   - brassy [informal], cheap, flash [informal], flashy, garish, gaudy, gimcrack, loud, tacky [informal], tatty [informal], tawdry, trashy
    
2. Based on pretence; deceptively pleasing
   "meretricious praise"; "a meretricious argument";
   - gilded, specious, glossy
    
3. [archaic] Like or relating to a prostitute
   "meretricious relationships"

See also: insincere, tasteless