Source : Webster's Revised Unabridged Dictionary (1913)

Smithereens \Smith`er*eens"\ (sm[i^][th]`[~e]r*[=e]nz"), n. pl.
   Fragments; atoms; smithers. [Colloq.] --W. Black.

Source : WordNet®

smithereens
     n : a collection of small fragments considered as a whole;
         "Berlin was bombed to smithereens"; "his hopes were
         dashed to smithereens"; "I wanted to smash him to
         smithereens"; "the toilet bowl ws blown to smitereens"