WordWeb Online

1. [informal] Small and of little importance
   "a trivial sum of money";
   - fiddling [informal], footling [informal], lilliputian [informal], little [informal], niggling [informal], piddling [informal], piffling [informal], petty [informal], picayune [N. Amer, informal], niggly [informal], piddly [informal]
    
2. Of little substance or significance
   "only trivial objections";
   - superficial
    
3. Concerned with trivialities
   "a trivial young woman"; "a trivial mind"

See also: frivolous, insignificant, unimportant

Encyclopedia: Trivial