WordWeb Online

1. Found in the ordinary course of events
   "a placid mundane scene";
   - everyday, quotidian, routine, unremarkable, workaday
    
2. Concerned with the world or worldly matters
   "mundane affairs";
   - terrestrial
    
3. Belonging to this earth or world; not ideal or heavenly
   "not a fairy palace; yet a mundane wonder of unimagined kind";
   - terrene
    
4. Not challenging; dull and lacking excitement
   "a mundane job greasing engines";
   - commonplace, humdrum, prosaic, unglamorous, unglamourous [Brit, non-standard]

See also: earthly, ordinary, secular, temporal, unexciting, worldly

Encyclopedia: Mundane