WordWeb Online

1. Of or relating to or characteristic of tragicomedy
   "a playwright specializing in tragicomic drama"
    
2. Manifesting both tragic and comic aspects
   "the tragicomic disparity...between man's aspirations and his accomplishments"
   - tragicomical
    
3. Having pathetic as well as ludicrous characteristics
   "her life...presented itself to me as a tragicomic adventure"
   - tragicomical

See also: humorous, humourous [Brit, Cdn, non-standard], sad, tragicomedy