Source : Webster's Revised Unabridged Dictionary (1913)

En bloc \En` bloc"\ [F. Cf. {Block}, n. ]
   In a lump; as a whole; all together. ``Movement of the
   ossicles en bloc.'' --Nature.

         En bloc they are known as ``the herd''.  --W. A.
                                                  Fraser.

Source : WordNet®

en bloc
     adv : all together; "the students turned out en masse" [syn: {en
           masse}, {as a group}]