1. [n]  gunfire directed along the length rather than the breadth of a formation
2. [v]  rake or be in a position to rake with gunfire in a lengthwise direction

ENFILADE is a 8 letter word that starts with E.

1. \En`fi*lade"\ (?; 277), n. [F., fr. enfiler to thread,
   go trough a street or square, rake with shot; pref. en- (L.
   in) + fil thread. See {File} a row.]
   1. A line or straight passage, or the position of that which
      lies in a straight line. [R.]
   
   2. (Mil.) A firing in the direction of the length of a
      trench, or a line of parapet or troops, etc.; a raking
      fire.
   
   

2. \En`fi*lade"\, v. t. [imp. & p. p. {Enfiladed}; p. pr.
   & vb. n. {Enfilading}.] (Mil.)
   To pierce, scour, or rake with shot in the direction of the
   length of, as a work, or a line of troops. --Campbell.