enfilade

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Gunfire directed along the length of a target, such as a column of troops.
• noun A target vulnerable to sweeping gunfire.
• noun Architecture A linear arrangement of a series of interior doors, as to a suite of rooms, so as to provide an unobstructed view when the doors are open.
• transitive verb To rake with gunfire.

from The Century Dictionary.

• Milit., to pierce, scour, or rake with shot through the whole length, as a work or line of troops; be in a position to attack (a military work or a line of troops) in this manner.
• noun Milit., a line or straight passage; specifically, the situation of a place, or of a body of men, which may be raked with shot through its whole length.
• noun Milit., An infantry or artillery fire which sweeps a line of works or men from flank to flank.

from the GNU version of the Collaborative International Dictionary of English.

• noun rare A line or straight passage, or the position of that which lies in a straight line.
• noun (Mil.) A firing in the direction of the length of a trench, or a line of parapet or troops, etc.; a raking fire.
• transitive verb (Mil.) To pierce, scour, or rake with shot in the direction of the length of, as a work, or a line of troops.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun gunfire directed along the length of a target
• noun architecture a series of doors that provide a vista when open
• verb transitive to rake something with gunfire

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun gunfire directed along the length rather than the breadth of a formation
• verb rake or be in a position to rake with gunfire in a lengthwise direction