What does the word enfilade mean?

Usage examples for enfilade

  1. As this ravine ran at right angles with the river, the sixty men would enfilade an enemy attacking the vessels, and the guard of the vessels would at the same time enfilade an enemy should he attack the cattle on the north side. – Ismailia by Samuel W. Baker
  2. On the flank a machine- gun was going, taking them in enfilade. – No Man's Land by H. C. McNeile