• (a.) Dull; uninteresting; commonplace; unimaginative; prosy; as, a prosaic person. • (a.) Of or pertaining to prose; resembling prose; in the form of prose; unpoetical; writing or using prose; as, a prosaic composition. Found on http://thinkexist.com/dictionary/meaning/prosaical/
1) Commonplace 
• (a.) Dull; uninteresting; commonplace; unimaginative; prosy; as, a prosaic person. • (a.) Of or pertaining to prose; resembling prose; in the form of prose; unpoetical; writing or using prose; as, a prosaic composition.